Answer:
kinetic energy increases because of speed and motion overall
Explanation:
dont know if i helped you but you can give me a thumbs down if you hate the answer or it is not the answer you are looking for
An object experiences a uniform circular motion in a horizontal plane, as illustrated below. The direction of the net force is ____. which letter
Answer:
C
Explanation:
Centripital force points to the center.
Using Newton's second law we can know the direction of the force that creates the uniform circular motion, the correct answer is:
C) The force must go towards the center of the circle
Newton's second law establishes a linear relationship between force and mass of the body and its relationship is
F = m a
The bold letters indicate vectors, where F is the force, m the mass that is a scalar and the acceleration of the body
By analyzing this expression we see that the direction of the net force and the acceleration are the same,
The uniform circular motion is characterized by having a speed, speed modulus, constant therefore in the movement the acceleration vector must be perpendicular to the speed so that the change is of direction only.
The acceleration must go towards the center of the circle and by Newton's second law the net force must also go towards the center of the circle.
Let's analyze the different strengths of the graph
a and d) Tangential force to the circle
False. This force changes the modulus of the velocity so the movement stops being uniform circular
e) outward perpendicular force
False. This force changes the direction of the velocity and maintains its modulus, but the antiparallel to the acceleration which contradicts Newton's second law
b) Force at an angle.
False. This force can be decomposed into two vectors, one parallel and the other perpendicular to the circle, the parallel vector combines the speed modulus and the movement is elliptical.
c) Force towards the center of the circle.
True. This force changes the direction of the velocity and maintains its modulus, in addition, the acceleration is in the direction of the change in velocity, which is why the particle describes the circle.
Using Newton's second law we can know the direction of the force that creates the uniform circular motion having the correct answer is:
c) The force must go towards the center of the circle
learn more about the centripetal force here:
https://brainly.com/question/14249440
A pyrotechnical expert needs to fire a 15 kg projectile from a launching device that has a barrel length of 2 meters. The projectile will need to be launched horizontally 1 km in 5 seconds. Calculate the force needed to launch the projectile.
Answer:
The force needed to launch the projectile is 150000 N.
Explanation:
We can find the force using the following equation:
[tex] F = ma [/tex]
Where:
m: is the mass = 15 kg
a: is the acceleration
First, we need to find the acceleration of the projectile:
[tex] v_{f}^{2} = v_{0}^{2} + 2ax [/tex]
Where:
[tex]v_{f}[/tex]: is the final speed
[tex]v_{0}[/tex]: is the initial speed = 0
x: is the distance = 2 m
The final speed is:
[tex]v_{f} = \frac{1 km}{5 s}*\frac{1000 m}{1 km} = 200 m/s[/tex]
Then, the acceleration is:
[tex]a = \frac{v_{f}^{2}}{2x} = \frac{(200 m/s)^{2}}{2*2 m} = 10000 m/s^{2}[/tex]
Finally, the force is:
[tex]F = ma = 15 kg*10000 m/s^{2} = 150000 N[/tex]
Therefore, the force needed to launch the projectile is 150000 N.
I hope it helps you!
a bus moving at speed of 25m/s beginning to slow at rate 4m/s^2each second how long does it take to stop
Explanation:
Initial velocity is 25m/s i.e. u. Final velocity would be zero since the bus stopped. It is noted that the bus deccelartion of 4m/s, so the acceleration should be considered negative of 4m/s I.e. 4m/s. So using third law of motion i.e.
v^2 - u^2= 2as
(0)^2 - (25)^2= -2×4×s {Note here I used minus sign in acceleration}
-625 = -8×s
s=625 ÷ 8
s= 125 m
So bus would cover a distance of 125m before coming to rest.
a) Calculate force FL upwards (the hand on the right)
b) Calculate Fr downwards
Answer:
did you find the answer yet??
Explanation:
Another coin is thrown up into the air and hit the ground after 6s with a velocity of -60 m/s after experiencing an acceleration of -9.8 m/s2. What was its initial velocity?
Answer:
Vf = Vi + a t fundamental equation
-60 m/s= Vi - 9.8 m/s^2 * 6 sec taking upward direction as positive
Vi =58.8 m/s - 60 m/s = -1.2 m/s so the coin was initially thrown downward
As a check take the downward direction as positive
Vf = 1.2 m/s + 58.8 m/s = 60 m/s
Fill in each blank with the correct word.
A male reproductive cell is called a(n) .
A female reproductive cell is called a(n) .
When male and female reproductive cells join during fertilization, a(n) forms.
Answer:
male= sperm cell
female= egg cell
together= embryo
Explanation:
Answer:
1. sperm
2. egg
3. zygote
Explanation I took this test and these are the correct answers because the third one above is not right.
HELP ASAP!!!
The development of the periodic table created predictable trends. What trend
does electronegativity follow?
Answer:
electronegativity increases from left to right
Explanation:
took quiz
PLEASEEE HELPPP...Balance the following equation: _ Hv2_0v2--> Hv20
(the v is meant to show the following Tasks:
please help!!!!!!!!!!
Answer:
C. Acceleration due to gravity
Explanation:
which is 9.8 m/s2 on Earth. The formula for calculating weight is F = m × 9.8 m/s2.
which sustainable practice is paired correctly with its impact on the environment.
Answer:
Answer: Creating more wind farms results in a reduction of fossil fuel use
Explanation:
Economical improvement is to make earth a superior spot for everybody, without wrecking the opportunities for the following ages. There are numerous Eco frameworks that should be in equilibrium for us to live here, the atmosphere framework is one of them. This framework guarantees that the atmosphere is right and the air transmits the perfect measure of sunlight based energy. With the destructive nurseries gases, (for example, Carbon dioxide) we stop up the air, this progressions the temperature of the earth that can influence our turn of events
How we use energy is extraordinarily significant. Oil and coal are tests of energy that we may run out of, utilizing energy that restore themselves (wind ranches) is useful for the planet. Wind, water and sun are maintainable.
Hope this Helps (✿◡‿◡)
Answer:
Answer: D.Creating more wind farms results in a reduction of fossil fuel use
Explanation:
A place Or object used for comparison to determine if something is in motion is called a what?
Answer:
[tex] \boxed{ \bold{ \sf{Reference \: point}}}[/tex]
A place or object used for comparison to determine if something is in motion is called a reference point .
✎ Explanation :
A reference point can be defined as a fixed point / place / object from which we compare the motion of an object. For example :
When we are travelling by bus , we are in motion with respect to a nearby tree. Here , the tree acts as a reference point or reference frame.Hope I helped!
Have a wonderful time ツ
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how height does a 2.5 Kg object rises when 255J of work done against gravity A 637.5 B 20.5 C 15m D 10.2 m
Answer:
D 10.2
Explanation:
255 ÷ 2.5= 10.2 or D
Answer:
D
Explanation:
Work = Mass * Gravity(9.8) * Height
height=work/(mass*9.8)
height=255/(2.5*9.8)=10.4m
PLEASE HELP!! ILL MARK BRAINLYEST!!
All matter has mass and takes up space.
True
False
Answer: True
Explanation:
Mass is the amount of matter in an object. Everything is made up of matter.
Answer: true
Explanation: Matter is all the “stuff” that exists in the universe. It has both mass and volume. Mass measures the amount of matter in a substance or an object.
Which layer cools with height and also has the earths weather in it
A the Troposphere
B The stratosphere
C The thermosphere
D the Mesosphere
Answer:
A) Troposphere
Explanation:
It is the lowest layer of the earth's atmosphere.
The transfer of heat by the movement of a fluid is called: Think about it: Imagine a pocket of air over the land (“land air”), and another pocket of air over the ocean (“ocean air”).
Which air pocket would you expect to heat up more during the day?
Why?
Answer:
The transfer of heat by the movement of fluid is called Convection Heat Transfer
Explanation:
Heat transfer by convection is the transfer of heat by fluid transport from one place to another, such that convection takes place when the heat that comes in contact of fluid containing body is moved to other parts of the container by the transporting fluid
Heat is transferred within a fluid medium mainly by convection (movement of heat by the transfer of fluid particles in the medium)
Convection heat transfer is a combination of conduction and advection heat transfer
In 2-3 sentences Explain the relationship between speed, frequency, and wavelength
Answer:
The relationship of the speed of sound, its frequency, and wavelength is the same as for all waves: vw = fλ, where vw is the speed of sound, f is its frequency, and λ is its wavelength. ... The frequency is the same as that of the source and is the number of waves that pass a point per unit time.
Explanation:
HOPE THIS HELPS ;}
PLEASE HELP!! ILL MARK BRAINLYEST!!!
A change in temperature causes a change in mass.
True
False
Answer:
False
Explanation:
What is the speed of gravity on Earth?
(Free question if your learning physics!)
Answer:
25038.72 mph (filler please ignore)
Answer:
Ignoring the effects of air resistance, the speed of gravity on Earth is 9.81 m/s 2.
Explanation:
Help me with this please!
Answer:
b i. The curve would be less steep than both of the graphs.
c. The temperature was the same at the start of the experiment so that the only variable changed in the experiment would be the thickness of the walls and the change in temperature can be measured from the same starting temperature, ensuring a fair experiment.
Explanation:
b i. Since you know that a thicker wall conducts heat from the inside room to the surroundings slower (based on my previous answer ;)), heat from the room would be conducted to the surroundings by the thicker wall slower and the temperature change will be less drastic and the graph would be less steep.
c. In an experiment, only one independent variable can be changed and we would normally record the dependent variable to get a conclusion for the experiment as the dependent variable is the variable that is affected by the independent variable. We should not change any other variable in the experiment, such as the starting temperature of the experiment.
For e.g. If you want to find out how the amount of water affects a plant's growth, the amount of water would be the independent variable and that would be the only thing you would change in that experiment. During the experiment, you would record the dependent variable, which is the height of the plant. The type of plants used and the type of soil..etc should be kept the same/constant so that it is a fair experiment, as a better type of soil may make the plant grow taller.
Which of the following would result in the biggest INCREASE in erosion by a river
How to calculate maximum height, when i know only V
Pleeeaaassseee as fast as you can
Answer: was it this problem?
Explanation:
Eli and Andy want to find out which of the two is stronger. Eli pushes a table with a force of 120 newtons while Andy pushes the table from the opposite side with a force of 125 newtons. Ignoring the masses of Eli and Andy, what is the resultant acceleration of the table if its mass is 10.0 kilograms?
A.
13.5 meters/second2
B.
0.50 meters/second2
C.
4.0 meters/second2
D.
5.50 meters/second2
E.
1.35 meters/seconds2
Answer:
B. 0.50 meters/second^2
Explanation:
Given:
mass of table (m) = 10.0 kgEli's force (F1) = 120 NAndy's force (F2) = -125 NArranging Formulas and Substituting Values, Part 1:
F = F1 + F2F = 120 + (-125)F = -5 NThe -5 means that the table will move along the direction of the force applied by Andy.Arranging Formulas and Substituting Values, Part 2:
m * a = Fa = F / Ma = -5 / 10.0 kga = -0.5 m/s^2Answer:
B. 0.50 meters/second^2
Explanation:
Weekend A
Assignment
Differentiate between forced and damped oscillation
Answer:
A damped oscillation means an oscillation that fades away with time while Forced oscillations occur when an oscillating system is driven by a periodic force that is external to the oscillating system.
Explanation:
Damping is the reduction in amplitude (energy loss from the system) due to overcomings of external forces like friction or air resistance and other resistive forces. ... When a body oscillates by being influenced by an external periodic force, it is called forced oscillation.
Hope this helpedWelcome
How will you express the following in m: a. 10 nm b. 110 pm c. 120 mm d. 200 km
Please help me
Answer:
1 km = 1000 m
1 m = 100 cm
1 m = 1000 mm
1 cm = 10 mm
hope this helps u figure it out :)
What effect do you think thermal energy and the transfer of heat in Earth’s interior have on the surface of the planet?
A.
They cause the seasons to change.
B.
They cause the plates to move around.
C.
They cause the average global temperature to rise.
Answer:
C
Explanation:
The sun's radiation strikes the ground, thus warming the rocks. As the rock's temperature rises due to conduction, heat energy is released into the atmosphere, forming a bubble of air which is warmer than the surrounding air. This bubble of air rises into the atmosphere.
Answer:
A
Explanation:
It’s cold in the winter
hot in the summer
and in spring it’s warm
What variables have the most effect on the strength of the gravitational attraction between two massive objects?
Help
Answer:
The distance between the 2 centers of the object.
Explanation:
If it's harder to win a super bowl for the rams than the gravity means the chiefs will win it.
The other name for 'net force' is 'unbalanced force'. What is the name of the force that could be applied to an object that would balance a net force and create a state of equilibrium?
Answer:
Friction
Explanation:
This is because friction tends to oppose the motion of an object. Since the unbalance force or net force causes a motion of the object, the frictional force would tend to oppose the object until it is large enough to balance the net force. When this is done, equilibrium is achieved.
At this instance, there is no net force acting on the object.
So, the forces on the object become balanced and in a state of equilibrium.
A child pulls on a toy locomotive of mass 0.979 kg with a force of 3.25 N to the right. The locomotive is connected to two train cars by cables. Friction in the axles results in an effective coefficient of kinetic friction between the floor and the train which is 0.110. One car has a mass of 0.952 kg and the other has a mass of 0.419 kg.
What is the acceleration of the train?
What is the tension in the cable between the locomotive and the car connected to the locomotive?
Hints: For part (a), consider the locomotive and the 2 cars to be one “object”.
For part (b). consider the “object” to be the 2 cars.
Answer:
(a) The acceleration of the train and cars is approximately 0.304 m/s²
(b) The tension between the locomotive and the car connected to the locomotive is approximately 0.4166 N
Explanation:
The given parameter are;
The mass of the toy locomotive = 0.979 kg
The mass of one car = 0.952 kg
The mass of the other car = 0.419 kg
The total mass of the train locomotive and cars = 0.979 + 0.952 + 0.419 = 2.35 kg
The weight of the train locomotive and cars = 9.81 m/s² × 2.35 kg = 23.0535 N
The normal force of the train and cars = The weight of the train locomotive and cars = 23.0535 N
The coefficient of dynamic friction = The normal force × The coefficient of dynamic friction
The coefficient of dynamic friction = 23.0535 × 0.110 = 2.535885 N
The applied force = 3.25
The net force acting on the train locomotive and cars = 3.25 - 2.535885 0.714115 N
(a) Force = Mass × Acceleration
Acceleration = Force/Mass
∴ The acceleration of the train and cars = 0.714115 N/(2.35 kg) ≈ 0.304 m/s²
(b) The tension between the locomotive and the car connected to the locomotive = T₂ = ( (m₁ + m₂)/ (m₁ + m₂ + m₃)) × F
Therefore, T₂ = ( (0.952 + 0.419)/ (0.952 + 0.419 + 0.979)) × 0.714115 ≈ 0.4166 N.
A paint can is sitting on a ladder 20 m high. It has a mass of 7 kg. What is the
potential energy of the paint can?
Answer:
The answer is 1400 JExplanation:
The potential energy of a body can be found by using the formula
PE = mgh
where
m is the mass
h is the height
g is the acceleration due to gravity which is 10 m/s²
From the question we have
PE = 20 × 10 × 7
We have the final answer as
1400 JHope this helps you
In a car engine, what type of energy is released at a high level, leading to inefficiency?
A. Mechanical
B. Electrical
C. Chemical
D. Thermal