Answer:
f=1.5MHz or f=1500Hz
Explanation:
f=v/λ
3×10⁸/2×10-⁵
f=1500Hz
f=1.5MHz
a conducting sphere is charged to a value of 2x10-6 coulombs. what is the potential difference from one side of the sphere to the other side of the sphere? explain.
The potential difference from one side of the sphere to the other side of the sphere is zero.
Potential difference between any two points In the electric field is defined as the amount of work done in moving a unit positive charge without acceleration from one point to another along any path between the two points.
The potential on the surface of sphere with radius r is,
[tex]V= \dfrac{kq}{r}[/tex]
where q is the charge on the sphere, r is the radius of sphere(that is the distance of center to the surface) and k is the permittivity of free space.
On the either sides of sphere the distance from the center is same. Hence the V will be same. Therefore the potential difference is zero.
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Of the following, which energy resource(s) can be extracted from marine sediments? Choose all Halite
that apply.
Petroleum
Manganese nodules
Phosphorites
Gas hydrates
Petroleum and gas hydrates are the principal energy sources linked to marine sediments.
Which four types of marine sediments are there?
Lithogenous, hydrogenous, biogenous, and cosmogenous are the four categories. Rivers, ice, wind, and other activities on land are how lithogenous sediments are transported. When planktonic creatures' exoskeletons degrade, they produce biogenous sediments. Chemical processes in the water produce hydrogenous sediments.
A fossil fuel is petroleum, sometimes referred to as crude oil. Petroleum was created from the remains of extinct marine animals like plants, algae, and bacteria, just like coal and natural gas. A crystalline solid made of water and gas is called a gas hydrate. It resembles ice in appearance and behavior but is actually very methane-rich and is known to exist on every continent.
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explain how the balance of gravity versus thermal pressure predicts that a cloud should fragment into many stars.
Clouds are said to collapse when their self gravity exceeds the support provided by thermal pressure.
As gas pressure alone cannot overcome the gravitational pull a cloud exerts on itself, molecular clouds are prone to gravitationally collapse.
When self-gravity is greater than the support offered by thermal pressure, clouds collapse. Any cloud larger than a certain mass will collapse for any given density and temperature. The cloud gets denser and the balance mass gets smaller as it collapses.
So, the individual sub pieces of the cloud can collapse. The collapsing cloud fragments into many smaller collapsing pieces. Eventually, a cluster of low mass stars are formed rather than a single massive star.
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if you were to stand up and sprint as fast as you could for about 10 seconds, what fuel sources would allow you to do this?
If you were to stand up and sprint as fast as you could for about 10 seconds, your body would primarily rely on stored carbohydrates (in the form of glycogen) as the main fuel source.
During high-intensity activities such as sprinting, the body's demand for energy increases rapidly. To meet this increased demand, the muscles break down glycogen into glucose, which is then converted into ATP (adenosine triphosphate), the primary energy currency of the cell.
In addition to glycogen, a small amount of fat may also be used as a fuel source during sprinting, but at such a high intensity, carbohydrates are the primary energy source.
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the microscopic structure of a polarizing filter is analogous to a __________.a. window screenb. barbeque grillc. roll pf coinsd. kitchen sievee. plate of spagetti
A polarizing filter tiny structure is comparable to a kitchen sieve. Hence, the correct option is (d).
A kitchen sieve is a device that is used to filter or sift particles of different sizes. It has a mesh or net-like structure that allows only particles of a certain size to pass through. Similarly, a polarizing filter is a device that allows only light waves of a certain orientation to pass through while blocking others. It has a microscopic structure that consists of a series of aligned molecules or crystals that act like a mesh to filter out certain orientations of light waves. The mesh-like structure of a kitchen sieve is similar to the microscopic structure of a polarizing filter because both have small openings or pores that allow only certain things to pass through while blocking others. Therefore, the answer is (d) kitchen sieve.
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tthe planet Mars may be considered to be an isolated sphere of diameter of 6.79×10^6m with it's mass of 6.42×10^23 kg concentrated at its center. A rock of mass 1.40kg rests on the surface of Mars.
(assume that the dimensions of the rock are negligible compared to the radius of Mars)
(I) determine the weight of the rock on Mars
(ii) show that the gravitational potential energy of the rock is -1.77×10^7J
The weight of the rock on mars is 3.71 N
How to find the weight of rock on MarsI. To determine the weight of the rock on Mars, we need to calculate the force of gravity acting on the rock. The force of gravity can be calculated using the equation:
F = G * (m1 * m2) / r^2
where
F = force of gravity
G = gravitational constant (6.67 × 10^-11 N(m/kg)^2)
m1 = mass of Mars (6.42 × 10^23 kg)
m2 = mass of the rock (1.40 kg)
r = radius of Mars (3.39 × 10^6 m)
Plugging in the values, we get:
F = 6.67 × 10^-11 * (6.42 × 10^23 * 1.40) / (3.39 × 10^6)^2
F = 3.71 N
So the weight of the rock on Mars is 3.71 N.
II. The gravitational potential energy of the rock can be calculated using the equation:
U = - G * m1 * m2 / r
Plugging in the values, we get:
U = - 6.67 × 10^-11 * 6.42 × 10^23 * 1.40 / 3.39 × 10^6
U = -1.77 × 10^7 J
So the gravitational potential energy of the rock on Mars is -1.77 × 10^7 J.
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how much kinetic energy will an electron gain (in joules and ev) if it accelerates through a potential difference of ?
If the electron accelerates through a potential difference of 18500 V , then the electron will gain 2.96 × 10⁻¹⁵ Joules and 1.85 × 10⁴ eV .
The amount of Kinetic Energy that an electron gain which accelerates through a potential difference of 18500 V is calculated by using the equation: ΔK = eV ;
where ΔK is = change in kinetic energy,
⇒ e is = electron charge (approximately 1.60×10⁻¹⁹ C), and V is = potential difference.
Substituting in values, we get ;
⇒ ΔK = (1.60×10⁻¹⁹ C) × 18500 V
⇒ 2.96 × 10⁻¹⁵ Joules
In electron volts (eV), the energy is calculated as :
⇒ ΔK (eV) = ΔK/(1.60 × 10⁻¹⁹ J/eV)
⇒ ΔK (eV) = (2.96 × 10⁻¹⁵ Joules)/(1.60 × 10⁻¹⁹ J/eV) ;
⇒ 1.85 × 10⁴ eV
The given question is incomplete , the complete question is
How much Kinetic energy will an electron gain (in Joules and eV) if it accelerates through a potential difference of 18500 V ?
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the car of prob. 3/50 is traveling at 25 mi/hr when the driver applies the brakes, and the car continues to move along the circular path. what is the maximum deceleration possible if the tires are limited to a total horizontal friction force of 2400 lb?
When the driver hits the brakes, the car of Approx. $3 / 61$ is moving around the circular road at a speed of $25 mathrm mi / mathrm hr.
What makes speed different from speed?
The distance traveled in a unit of time is called speed. It refers to a thing's rate of movement. The scalar quantity known as speed is the velocity vector's magnitude. It has no clear direction. An thing is travelling more quickly when its speed is higher. It is traveling more slowly when the speed is lower. It has zero pace if it isn't traveling at all.
What is an object's typical speed?
The relationship between average speed and velocity is Vav = st. While velocity indicates the how fast and in what direction an object is travelling, speed merely indicates how rapidly an object is moving. A car's speed has been mentioned if it is stated to be 60 km/h.
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How are Newton's Laws used to describe the motion of planets? Justity your response In two or more complete
sentences in the essay box below.
Newton's Laws of Motion can be used to describe the motion of planets. These laws state:
An object at rest will remain at rest, and an object in motion will remain in motion at a constant velocity, unless acted upon by an unbalanced force.
The acceleration of an object is directly proportional to the magnitude of the force applied, and inversely proportional to the mass of the object.
For every action, there is an equal and opposite reaction.
Using these laws, astronomers and physicists can make predictions about the motion of planets and other celestial bodies. For example, Newton's First Law can be used to explain why planets continue to orbit around stars, and why they move in a specific path instead of flying off into space. Newton's Second Law can be used to calculate the force of gravity between planets and stars, which determines their acceleration and velocity.
Finally, Newton's Third Law can be used to explain how planets and other celestial bodies interact with one another, such as how they influence each other's orbits. This helps to understand why planets sometimes experience changes in their paths and movements, such as when they are pulled or pushed by other celestial bodies.
Overall, Newton's Laws of Motion provide a framework for describing and predicting the motion of celestial bodies, and continue to play a critical role in our understanding of the universe.
if a proton at a distance for a charged particle is repelling with a given force, by how much will the force decrease when the proton is three times away? what is the sign of the particle?
If a proton is repulsed by a charged particle at a certain distance with a certain force, the force decreases as the proton gets three times farther away from the particle. For this, the equation is presented below.
It is possible to write the force between a proton and a charged particle as follows.
[tex]F = k q_{1} q_{2} r_{2} . F=\dfrac{kq_1q_2}{r^2}.[/tex]
With a rest mass of 1.67262*10⁻²⁷ kg or 1,836 times that of an electron, the proton is a stable subatomic particle with a positive charge that is equivalent to one electron's charge.
With the exception of the hydrogen nucleus, all atomic nuclei are composed of protons and neutrons, which are electrically neutral particles (which consist of a single proton). There is exactly the same number of protons in each of the nuclei of a given chemical element. The location of the element in the periodic table is determined by this number, which also serves to establish the atomic number of an element. An atom is electrically neutral when it has an equal amount of protons and electrons in its nucleus.
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Starting from rest, a particle moves along an axis from point A to point B with constant acceleration a = 2.20 m/2 through
displacement d = 500 m. Then it moves at constant acceleration a through displacement dz = 300 m from point B to point C. If the
total time is 60.0 s, what is the value of a2?
The value of a^2 is 3600 if Starting from rest, a particle moves along an axis from point A to point B with constant acceleration a = 2.20 m/2 through displacement d = 500 m.
To determine the value of a^2, we need to use the relationship between acceleration, displacement, and time, which is given by the equation:
[tex]d = 1/2 a t^2[/tex]
First, we can find the time t1 required for the particle to travel from point A to point B by using the equation:
[tex]d = 1/2 a t1^2[/tex]
Substituting the given values, we get:
[tex]500 = 1/2 (a) (t1)^2[/tex]
Rearranging and solving for t1:
[tex]t1 = \sqrt{} (500 / (1/2 a)) = \sqrt{} (1000 / a)[/tex]
Next, we can find the time t2 required for the particle to travel from point B to point C by using the equation:
[tex]dz = 1/2 a t2^2[/tex]
Substituting the given values, we get:
[tex]300 = 1/2 (a) (t2)^2[/tex]
Rearranging and solving for t2:
[tex]t2 =\sqrt{} (300 / (1/2 a)) = \sqrt{} (600 / a)[/tex]
Finally, we can use the total time t to find the value of a by using the equation:
t = t1 + t2
Substituting the values of t1 and t2, we get:
60 = sqrt(1000 / a) + sqrt(600 / a)
Squaring both sides, we get:
[tex]3600 = 1000 / a + 600 / a + 2 sqrt(1000 * 600) / a[/tex]
Rearranging and solving for a:
[tex]a = sqrt(3600 * a / (1000 + 600)) = sqrt(3600 * a / 1600)[/tex]
Squaring both sides again, we get:
[tex]a^2 = 3600 / (1600 / a) = 3600 * a / 1600[/tex]
Rearranging and solving for a^2:
[tex]a^2 = 3600^2 / 1600 = (60^2)^2 / (40^2) = 3600.[/tex]
So, the value of a^2 is 3600.
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do the two cars ever have the same velocity at one instant of time? if so, between which two frames?
The two cars have the same position at seven seconds; yet they never have the same velocity at any instant in time.
The blue car starts ahead of" the red car. (The red car actually starts off the screen.) Since the red car is moving faster, it eventually catches up with and passes the blue car. The position-time plot of each car's motion is depicted by a diagonal line with a constant slope.
At the time that the cars are side by side, the lines intersect. That is, the two cars share the same position at that instant in time. The lines would not intersect for a velocity vs. time graph.
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during a clear and pleasant night, you look up into the sky and recognize the planet mars near the center of the constellation of libra. if you look for mars the following night at around the same time, where are you most likely to find the planet?
Motion of Mars across the sky is not always predictable, but in general, Mars moves eastward relative to stars. This is because the Earth orbits the Sun faster than Mars, so the Earth moves in its orbit, it overtakes Mars, causing Mars to appear to move backwards (in retrograde motion) for a period of time before resuming its eastward motion.
However, the exact motion of Mars across the sky depends on many factors, including positions of Earth, Mars, and the Sun in their orbits. If you look for Mars the following night at around same time, you will need to locate it using star charts or astronomy apps that show the current position of Mars in the sky.
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Which of these illustrates potential energy due to gravity being converted into kinetic energy?
The answer is a rock falling from a cliff. This illustrates potential energy due to gravity being converted into kinetic energy.
When a rock falls off a cliff, its gravitational potential energy is converted into kinetic energy. This is because the potential energy of the rock is converted into kinetic energy as it falls and accelerates as it falls due to gravity. The potential energy of a rock is the energy stored in the rock due to its location relative to the Earth's gravitational field.
When falling, this potential energy is converted into kinetic energy, which is the energy of motion, and is accelerated by when falling due to gravity. This kinetic energy eventually causes the stone to hit the ground with considerable force.
Full Question:
Which of these illustrates potential energy due to gravity being converted into kinetic energy?
A rock falling from a cliffA burning log heats a container of water.A rubber band becomes harder to pull as it is stretched farther. Cells in the body convert food moleculeTo know more about Kinetic Energy:
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What impulse must be applied to a 1.08 kg cart to cause a velocity change of 12.0 m/s
Answer:
Explanation:
Impulse of force =12.96 Ns
Explanation:
Impulse = force* time = change in momentum = mass* velocity
Given the following data;
mass = 1.08kg
Change in velocity = 12m/s
Impulse of force = 1.08* 12 = 12.96Ns
what is the angular resolution of the human eye? what is the angular resolution of the human eye? about 1 arcsecond (1/3600 of a degree) about 1 milliarcsecond about 1 degree about 1 arcminute, or 1/60 of a degree
The angular resolution of the human eye is about 1 arcminute, or 1/60 of a degree or 1 arcminute.
Angular resolution of human eye is nearly 1/60 of a degree, which means that the smallest distinguishable angle that the human eye can perceive is approximately 1/60 of a degree.
This is equivalent to about 17.5 milliseconds of arc at the typical viewing distance of 25 cm from the eye to the object being viewed.
The human eye's ability to resolve small angles is limited by the size of its photoreceptor cells, called rods and cones, which are responsible for detecting light and transmitting visual signals to the brain.
The angular resolution of the human eye is much lower than that of many other animals, such as eagles and hawks, which can resolve angles as small as 2-3 arcseconds. This difference is due to the differences in the size and density of photoreceptor cells in the eyes of different species. In general, the larger and more densely packed the photoreceptor cells, the greater the angular resolution of an animal's eyes.
It is worth noting that the angular resolution of the human eye can vary depending on various factors, such as age, lighting conditions, and the presence of visual impairments.
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in which situation is the magnitude of the total momentum the largest? same magnitude in both situations situation (i) situation (ii)
Same momentum in both situations. Momentum is a vector. In Situation II the impulses are opposite and partially cancel each other out.
Which of following is most dynamic?
Momentum directly proportional to the object's mass and velocity. Faster speed means more momentum. Therefore, cars traveling at high speed on highways have the most momentum.
How do you know what has more momentum?
p = m v . From this equation we can see that momentum is directly proportional to the mass (m) and velocity (v) of the object. Therefore, the greater the mass of an object or the greater its velocity, the greater its momentum. A large, fast-moving object has more momentum than a small, slow-moving object.
Which object has the greatest momentum and why?
Heavy objects have a more mass. Momentum is a product of mass, and a scalar quantity, and velocity, a vector. Therefore, if two objects have the same velocity, the heavier object with more mass will also have more momentum.
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Physics help me please I am struggling
The solutions to the following questions on wave, frequency, wavelength is as follows:
4Hz50cm/s2Hz6cm6.6m/s4mHow to calculate speed, frequency and wavelength?Wavelength is the length of a single cycle of a wave, as measured by the distance between one peak or trough of a wave and the next.
Wavelength is often designated in physics as λ, and corresponds to the velocity of the wave divided by its frequency.
QUESTION 1:
Period = 1/frequency
Frequency = 1/0.25 = 4Hz
QUESTION 2:
v = λf
v = 5 × 10 = 50cm/s
QUESTION 3:
λ = v/f
10 = 20/f
f = 2Hz
QUESTION 4:
λ = v/f
λ = 30/5 = 6cm
QUESTION 5:
f = 1/T
f = 1/3 = 0.33Hz
λ = v/f
20 = v/0.33
v = 6.6m/s
QUESTION 6:
λ = v/f
λ = 300/75
λ = 4m
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the oscillation period of a simple pendulum (as described in section 13.5) is measured to be t, and then the length of the pendulum is increased by a factor of 4. (for example, increased from 10 cm to 40 cm or 1 m to 4 m.) which option best describes the new period of the pendulum? group of answer choices
The new time period of the pendulum will be 2 times the original period.
The period of a simple pendulum is given by the equation:
T = 2π√(l/g)
where T is the period, l is the length of the pendulum, and g is the acceleration due to gravity.
If the length of the pendulum is increased by a factor of 4, the new period can be calculated as follows:
T' = 2π√(4l/g) = 2π√(4 × (l/g)) = 2π√4 × √(l/g) = 2 × 2π√(l/g) = 2T
Therefore, the new period of the pendulum will be 2 times the original period.
The period of oscillation of a pendulum is proportional to the square root of the length of the pendulum, so increasing the length of the pendulum by a factor of 4 will increase the period of oscillation by a factor of 2. This relationship can be shown mathematically by substituting the new length into the equation for the period of a pendulum.
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The oscillation period of a simple pendulum (as described in section 13.5) is measured to be t, and then the length of the pendulum is increased by a factor of 4. (for example, increased from 10 cm to 40 cm or 1 m to 4 m.) which option best describes the new period of the pendulum? group of answer choices
A. 2T
B. 4T
C. 8T
D. None of the above
suppose such a clock is calibrated correctly and then the temperature of the room in which it resides increases. does the clock run slow, fast, or correctly?
Warming causes the pendulum's length to lengthen, which lengthens the period. The clock will therefore run slowly.
What is a pendulum?
A weight that is suspended from a pivot so that it can swing freely is called a pendulum. A pendulum clock is a timepiece that keeps time by swinging a weight called a pendulum.
The length of time needed for a basic pendulum to complete one complete oscillation is known as its time period. The length of the pendulum also lengthens with temperature, lengthening the pendulum's period. As a result, it loses time as the temperature rises.
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how much ke would a proton acquire, starting from rest at b b and moving to point a a ? express your answer using two significant figures.
A proton starting from rest at point B and moving to point A would acquire 4.2 keV of kinetic energy. Expressing this answer using two significant figures yields 4.2 keV.
To further develop the topic, it is important to understand how kinetic energy is calculated. Kinetic energy is the energy of an object in motion, and is equal to one half of the mass of an object times the square of its velocity. In this case, the proton is moving from point B to point A, so the velocity of the proton at point A can be used to calculate the kinetic energy.
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an oil film ( ) floating on water ( ) is illuminated by white light at normal incidence. the film is thick. the reflected light will be predominately a single color. find the wavelength of the dominant visible light among the reflected light. take the range of visible light to be - .
The visible range is 6.02×10^-7 m.
The refractive index of the oil film is n=1.58
The thickness of the film is , t=286 nm= 286×10^-9 m
2nt=( m+ ½) λ
m=0, 1, 2,.....
Substituting m=0, t and n
2× 1.58 ×(286×10^-9) =(0+½) λ=1.81×10^-6m (This is of infrared range)
Substituting m=1, t and n
2× 1.58 ×(286×10^-9) =(1+½) λ=1.81×10^-6=6.02×10^-7 m, this is visible range
About wavelengthWaves are vibrations that propagate. There are many types of waves such as sound waves, mechanical waves, to electromagnetic waves. All waves have different characteristics.
The physical characteristics of the wave are represented by the wavelength, frequency, amplitude, direction of vibration, and also the direction of propagation. Wavelength is the distance of one wave and is represented by the Greek letter Lambda (λ).
On transverse waves, length can be calculated as the distance from the peak of the wave to the crest of the next wave, or the trough of the wave to the trough of the next. Whereas in longitudinal waves, the wavelength can be calculated from one stretch to the next stretch, or the distance from one density to the next.
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an object is moving in a straight line. at one instant, the object is moving at 4 m/s. 2 seconds later it is moving in 10 m/s. what is the average acceleration during these 2 seconds?
Answer:
a=3m/s squared
Explanation:
a=v-u/t
where a=acceleration,v=final velocity,u=initial velocity,t=time taken
a=10-4/2-0
a=6/2
a=3m/s squared
Which of the following is an abiotic factor in a biome?(1 point)
Responses
birds
water
insects
trees
The one that is an abiotic factor in a biome is option B. water
What is an abiotic factor?An abiotic factor in a biome is a non-living physical or chemical component of an ecosystem that affects the survival, growth, and behavior of the organisms that live in it. Examples of abiotic factors in biomes include temperature, light, moisture, soil type, topography, and atmospheric gases such as carbon dioxide and oxygen.
Therefore, the one that is an abiotic factor in a biome is option B. water
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A driver of a car moving with a uniform speed of 40m/s observes a truck approaching in the opposite direction with a speed of 20m/s.Calculate the speed of the car relative to that of the truck
Answer:
60m/s
Explanation:
since both are travelling in opposite direction,
relative speed will be the sum of the speed of both the vehicles
= 40m/s + 20m/s
= 60m/s
and we are done!
a 95kg man standing on a bathroom scale in an elevator calculate the reading of the scale if the elevator accelerates upward at a rate of 1.50m/s^2 and suppose it moves upward at a constant speed of 1m/s
Answer:
Below
Explanation:
You have conflicting statements....first you say it is accelerating....then you say it is constant speed.
Here is the force if the elevator is accelerating
95 ( 1.5 + 9.81) = 1074 N (if the scale reads N)
If the scale reads KG then 1074/9.81 = 109.5 kg
If the elevator is constant speed his weight will not change 95kg (932 N)
if the diameter of the plunger is 1.5 cm and that of the needle 0.25 mm , with what force does the fluid leave the needle?
Force by which fluid leave needle is 0.00063N,if the diameter of the plunger is 1.5 cm
Pascal's law (likewise Pascal's principle) or the rule of transmission of liquid tension) is a standard in liquid mechanics given by Blaise Pascal that expresses that a strain change anytime in a bound incompressible liquid is sent all through the liquid to such an extent that a similar change happens everywhere.[4] The law was laid out by French mathematician Blaise Pascal in 1653 and distributed in 1663
Pascal's standard is characterized as
An adjustment of strain anytime in an encased liquid very still is sent undiminished to all places in the liquid.Pressure applied on a liquid in an encased holder is communicated similarly and undiminished to all pieces of the compartment and acts at right point to the encasing walls.The tension applied to any piece of the encased fluid will be communicated similarly this way and that through the fluid.
We need to use pascal law for finding the force,which is F₁/A₁ = F₂/A₂ where F₁ is the amount of force applied on area(A₁) and F₂ is the force applied on area(A₂)
Here,(A₁)=πd²/4=3.14×(1.5)²/4=1.766cm²
Similarly,(A₂)=πd²/4=3.14×(0.025)²/4=0.00049cm²
Also,F₁=2.29N
So,2.29/1.766=F₂/0.00049
=>F₂=(2.29ˣ0.00049)/1.766
=>F₂=0.00112/1.766
=>F₂=0.00063N.
Hence,force by which fluid leave is 0.00063N.
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(Complete question) is:
A 2.29N force is applied to the plunger of a hypodermicneedle.
If the diameter of the plunger is 1.5 cm and that ofthe needle is
0.25 mm, with what force does the fluid leave theneedle?
If the crest of one wave overlaps the crest of
another, and both waves have an amplitude
of 2 meters, what is the resulting amplitude
when they meet?
The resulting amplitude when they meet is 4 units.
What is Amplitude?Amplitude is a term used in various fields including physics, engineering, and audio technology, with different meanings in each context. In physics and engineering, amplitude refers to the maximum displacement or magnitude of a wave or oscillation from its rest position. For example, in a sound wave, the amplitude is the maximum displacement of the air molecules from their average position, and it determines the loudness of the sound. In light waves, amplitude refers to the maximum intensity of the light wave, which determines its brightness. In audio technology, amplitude refers to the strength or volume of a sound wave. In digital audio, amplitude is typically represented by a numerical value and is used to control the volume of a sound.
As both are amplitude and one overlaps each other, the amplitude formula doesn't apply, we can simply multiply the waves
2 × 2
= 4
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Which statement best describes the motion of the box when the forces pull on the box
the required net force acting on the box is the difference between the two forces, which is 7 N to the left.
What is force?Force is a physical quantity that describes the interaction between two objects. It is a vector quantity, meaning it has both magnitude and direction.
The net force acting on the box is the difference between the two forces, which is 14 N - 7 N = 7 N to the left.
According to Newton's second law of motion, an object will move in the direction of the net force acting on it, so in this case, the box will move to the left. The magnitude of the acceleration of the box will be proportional to the magnitude of the net force, so the greater the net force, the greater the acceleration of the box.
Thus, the required net force acting on the box is the difference between the two forces, which is 7 N to the left.
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Consider two masses m1 and m2 connected by a thin string. Assume the following values: m1 = 4.2 kg and m2 = 1.0kg. Ignore friction and the mass of the string.
A: Find the acceleration of the two masses.
B: Changing the value of mass m1 while keeping mass m2 constant would change the acceleration of the two-mass system. What should be the value of mass m1 to get the largest possible value of acceleration of the two masses?
C: What would be the value of that maximum acceleration?
The acceleration of the masses are [tex]1.88 m/s^{2}[/tex]. The value of mass [tex]m_{1}[/tex] is zero to get maximum possible acceleration which is equal to [tex]9.8 m/s^{2}[/tex].
(A) The mass,[tex]m_{1} = 4.2 kg[/tex] and mass, [tex]m_{2} = 1.0 kg[/tex]
Let, the acceleration of mass [tex]m_{1}[/tex] and [tex]m_{2}[/tex] is [tex]a[/tex] as shown in the figure given below.
[tex]T = m_{1} a - (i)[/tex]
[tex]m_2 g -T = m_2 a -(ii)[/tex]
Put value of [tex]T[/tex] in equation [tex](ii)[/tex] from equation [tex](i)[/tex], we will get:
[tex]m_2 g - m_1 a = m_2 a[/tex]
[tex]m_2 g = m_1 a + m_2 a[/tex]
[tex]a = \frac{m_{1} }{m_{1} + m_{2} } g -(iii)[/tex]
[tex]a= \frac{9.8}{4.2 + 1}[/tex]
[tex]a = 1.88 m/s^{2}[/tex]
(B) For maximum acceleration, [tex]\frac{da }{dm_{1} } = 0[/tex]
[tex]\frac{d(\frac{m_{2} }{m_{1} +m_{2} }) }{dy} g = 0[/tex]
[tex]\frac{m_{1} }{(m_{1} +m_{2})^{2} } = 0[/tex]
[tex]m_{1} = 0[/tex]
(C) Put value of [tex]m_{1} = 0[/tex] in equation [tex](iii)[/tex]
[tex]a = \frac{m_{1} }{m_{1} + m_{2} } g[/tex]
[tex]a = g[/tex]
[tex]a = 9.8 m/s^{2}[/tex]
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