The magnitude of the net torque on the wheel due to these three forces for an axis perpendicular to the wheel and passing through its center is
¹/₂MR³a.
Net torque on the wheel
The net torque on the wheel is determined from the moment of inertia of the pulley and the angular acceleration of the pulley.
∑τ = Iα
where;
I is moment of inertia of pulleyα is angular acceleration of the pulleyLet the pulley be a solid uniform disk, the moment of inertia of the axis perpendicular to the wheel and passing through its center is calculated as;
I = ¹/₂MR²
τ = ¹/₂MR²α
τ = ¹/₂MR²(aR)
τ = ¹/₂MR³a
where;
a is the acceleration of the pulley due to the applied force.Thus, the magnitude of the net torque on the wheel due to these three forces for an axis perpendicular to the wheel and passing through its center is ¹/₂MR³a.
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could any of u help me with these question. Its 8th grade science i need help with it
A yacht sailing to the east at a constant velocity took 0.7hours to sail 70kilometers. What was the yacht's velocity?
Answer:
v = 100 [km/h]
Explanation:
To solve this problem we must identify that the movement is at constant speed, that is, there is no acceleration, therefore we must use the following expression for Speed, which relates is displacement with time.
v = d/t
where:
v = velocity [km/h]
d = displacement = 70 [km]
t = time = 0.7 [h]
v = 70/0.7 = 100 [km/h]
Flashcards should focus on a. Key points c. Both of these b. Bits of information d. None of these Please select the best answer from the choices provided A B C D.
Answer:
c
Explanation:
A toy car of mass 2-kg travels along a horizontal surface with negligible friction at a speed of 1.0 m/s. The car then collides with a vertical wall. The wall applies a force of magnitude 20 N for 0.2 s on the toy car. Which of the following predicts the motion of the toy care immediately after the collision?
A: The speed of the car will increase, and the car will travel in the opposite direction.
B: The speed of the car will decrease, and the car will travel in the opposite direction.
C: The speed of the car will remain the same, and the car will travel in the opposite direction.
D: The car will stop and remain motionless.
Please show your work in finding the direction of motion - ie. please don't use common sense but rather show the applicable physics principles along with formulas to find the direction of motion.
Answer:
An experiment is conducted in which a cart travels across a horizontal surface and collides with a wall. Data collected from the experiment are used to create the graph of the cart's velocity as a function of time. All frictional forces are considered to be negligible. Which data from the graph should the student use to determine the direction of the net force exerted on the cart and the direction of the change in momentum of the cart from the time intervals of A to B?
Explanation:
As we know that
Force=dp/dt(Change in momentum/time)So
20N=dp/2dp=10N/sHence the speed of car will remain the same it won't affect the speedAs momentum from wall is more the ball will travel in opposite directionOption C is correct
A force that resists two objects rubbing together is called _____.
OA) heat
OB) friction
OC) kinetic energy
OD) potential energy
Answer:
B
Explanation:
Friction is the force used to prevent 2 objects from rubbing against each other. This would mean if you rubbed your hands together you would feel the heat from the force of friction against the 2 objects namely your hands. Some things mitigate friction like water and soap. Water commonly used in waterslides reduces friction since the properties of water reduces the friction so much that you would be able to slide smoothly. This happens since wet object don't makes hard surfaces smooth. Soap does the same thing since the two objects are more slippery and can seem to get a grip on each other for friction. I hope this helps with your question thanks you and cya!
A Ford is traveling with a velocity of 15m/s, east, and is 200 m ahead of a Chevy traveling in the same direction at 20 m/s. How far will the Chevy travel before catching up to the Ford? Edit: nvm lol I found it
Answer:
Distance covered by Chevy before catching up to the Ford = 800 meters
Explanation:
From the graph attached,
A Ford starts with a velocity = 15 meter per second
Therefore, slope of the line representing the relation between the distance and time = [tex]\frac{\triangle s}{\triangle t}[/tex] = Velocity
Let the equation of the blue line,
y = m₁t + b
Where m₁ = slope of the blue line = speed of a Chevy
= 20 meter per second
b = y-intercept
y = 20t + 0 [Since, Chevy starts from the origin, b = 0]
y = 20t
Let quation of the red line,
y = m₂t + b
Where m₂ = Slope of the red line = 15 meter per sec
b = y-intercept = 200 m [Since Ford is 200 meters ahead of Chevy]
y = 15t + 200
Point where these lines will meet or the point where both the cars meet.
20t = 15t + 200
5t = 200
t = 40 seconds
Distance traveled by Chevy in 40 seconds = Velocity × Time
= 20 × 40
= 800 meters per seconds
What is the relationship of gas pressure to it temperature?
Explanation:
By Gay-Lussac's law
Pressure is directly proportional to its temperature at given volume.
When the temperature of a system goes up, the pressure also goes up, and vice versa.
Answer:
So, as pressure increases, temperature will increase as well or vice- versa
Explanation:
The Ideal Gas Equation is PV = nRT, where :-
P = Pressure
V = Volume
n = number of moles
R = Molar Gas Constant
T = Temperature
In this, P ∝ T
=> So, as pressure increases, temperature will increase as well or vice- versa
An object accelerates from rest to 35m/s over distance of 36 m . What acceleration did it experience
Acceleration : 17.01 m/s²
Further explanationLinear motion consists of 2: constant velocity motion with constant velocity and uniformly accelerated motion with constant acceleration
• An equation of uniformly accelerated motion
vf = vo + at
vf² = vo² + 2a (x-xo)
x = distance on t
vo / vi = initial speed
vt / vf = speed on t / final speed
a = acceleration
[tex]\tt vf^2=vo^2+2ax\rightarrow vo=0\rightarrow rest\\\\35^2=0^2+2.a.36\\\\1225=72.a\\\\x=17.01~m/s^2[/tex]
15 PLEASE HELP
Nora rides a bicycle for 5 min on a curvy road
at a constant speed of 10 m/s. Describe Nora's
ride in terms of position, velocity, and
acceleration. Compare the distance she rides
and her displacement.
Answer:
Ok, her position changed over time since the road is curved.
The velocity changed since the direction is changing
AccelerTion: theres a change in velocity since the direction changes
Direction: changed over time
Displacement : difference between 1st and final position
Explanation:
Displacement : difference between 1st and final position
What is Displacement?Displacement is defined as the change in position of an object. It is a vector quantity and has a direction and magnitude.
Ok, her position changed over time since the road is curved.
Accelertion: theres a change in velocity since the direction changes
Nora's ride in terms of position is 10*5*60 = 3000 meter is position
Displacement : difference between 1st and final position.
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why does heat flows from hot body to cold body?
Answer:
The atoms in the hot bodies have higher kinetic energy than those of the cold bodies. Thus to maintain thermal equilibrium, the atoms of higher kinetic energy tries to move and collide with the atoms of low kinetic energy. Thus heat transfers from a hot body to a cold body.
Explanation:
Explanation:The atoms in the hot bodies have higher kinetic energy than those of the cold bodies. Thus to maintain thermaler kinetic energy tries to move and collide with the atoms of low kinetic energy. Thus heat transfers from a hot body to a cold body.
10. A cyclist travels at 15m/s for 4 minutes. How far does she go?
Answer:
15*4=60
Explanation:
you would multiply
What is the gravitational potential energy of the tennis ball at position A?
Will give brainliest!
Love, which can’t be observed or measured directly, is an example of a psychological construct.
Please select the best answer from the choices provided
T
F
Name the three types of musical instruments. How is sound produced in each type?
Answer:
keyboard , guitar and violin
Poisoner's Handbook Video
Questions
1. What are some symptoms of cyanide poisoning?
2. Describe the state of death investigation in the New York Medical Examiner's office/police department prior to the
hiring of Dr. Norris?
3. What famous hospital became the home of Norris lab?
Bellevue Hospital
4. In what ways did the local government officials (mayor, etc.) try to discourage Norris?
5. Morris believed that Prohibition had become a plague? Why did he refer to Prohibition as a "national experiment in
extermination'?
6. Why was the Standard Oil manufacturing plant referred to as the looney bin?
7. What is illuminating gas? Why was it responsible for more deaths in New York than measles and tuberculosis?
8. Radium was used in painting clock and watch faces because it glowed and make the numbers and hands illuminate
at night. These were worn by servicemen during the war. Women worked in the factories painting these time
pieces during war time. They were known as the radium girls. What effects did these girls experience as a results of
their exposure to radium?
9. What mineral does radium mimic? What effect does this have on the body?
10. Describe New York when the depression hit?
11. What did Prohibition promise that did not happen?
12. Who is Mike the Durable? How did he get this nickname?
Dizziness, Headache, Nausea, vomiting, rapid breathing, rapid heart rate, Restlessness and Weakness are the symptoms that shows poisoning of cyanide.
What are some symptoms of cyanide poisoning?Dizziness, Headache, Nausea and vomiting, Rapid breathing, Rapid heart rate, Restlessness and Weakness are the some of the symptoms of cyanide poisoning. Cynaide is a very dangerous and fast acting poison that leads to death if not treated on time.
So we can conclude that all above are the symptoms caused by cyanide poisoning.
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What is the relationship between amplitude and frequency of a wave?.
Answer:
The relationship between the wave's amplitude and frequency is such that it is inversely proportional to the frequency. The amplitude decreases as the frequency increases. The amplitude increases as the frequency decreases. The higher the energy of a wave, the higher the amplitude. The lower the energy, the lower the amplitude. Energy has no effect on wavelength, speed, or frequency, only the amplitude.
Explanation:
What are the Fundamental units involved in pressure
Answer:
density and volume
Explanation:
density and volume
what is the relationship between magnets and emf
Answer:
Movement of a magnet relative to a coil produces emfs as shown. The same emfs are produced if the coil is moved relative to the magnet. The greater the speed, the greater the magnitude of the emf, and the emf is zero when there is no motion.
Hope this helps!
Resistor 1 has twice the resistance of resistor 2. They are connected in parallel to a battery. The ratio of the thermal energy dissipation by 1 to that by 2 is:
The ratio of the thermal energy dissipation by resistor 1 to that by resistor 2 will be 1 : 2
The Resistance of a ResistorResistors can be arranged in series or parallel
The resistors arranged in parallel will have the same potential difference across each every one of them.
Given that Resistor 1 has twice the resistance of resistor 2. They are connected in parallel to a battery. That is
[tex]R_{1}[/tex] = 2[tex]R_{2}[/tex]
Power P = lV
from Ohm's law
V = lR
Make l the subject of formula
l = V/R
Substitute l into power formula
P = [tex]V^{2}[/tex] / R
For the Resistor 1,
P = [tex]V^{2}[/tex] / 2[tex]R_{2}[/tex]
For the Resistor 2
P = [tex]V^{2}[/tex] / [tex]R_{2}[/tex]
The ratio of the thermal energy dissipation by 1 to that by 2 will be
[tex]V^{2}[/tex]/2[tex]R_{2}[/tex] x [tex]R_{2}[/tex]/[tex]V^{2}[/tex]
The [tex]V^{2}[/tex] and the [tex]R_{2}[/tex] will cancel out.
Therefore, the ratio of the thermal energy dissipation by 1 to that by 2 will be 1:2
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An object of mass 4.0kg is situated at a point where there is gravitational field strength of 9.0N/kg. What is the weight of the object
Answer:
Explanation: mASS = 4 KG
G.F = 9 N/KG
SO
W = 9 X 4
W = 36 N
What body systems work together whenever you get a cut on your finger?
A. Reproductive and skeletal system
B. Circulatory system and immune system
C. Circulatory system and digestive system
D. Digestive system and nervous system
How many energy levels do elements in Period 6 have?
Answer:
food
Explanation:
What is the strength of the electric field 0.020 m from a 12 µc charge? (use k=) 5.4 × 106 n/c 2.7 × 108 n/c 5.4 × 1012 n/c 2.7 × 1014 n/c
The strength of the electric field will be 2.7 x 108 N/C.
What is the strength of the electric field?The strength of the electric field is the ratio of electric force per unit charge. Its unit is NC⁻¹.
The given data in the problem is;
E is the strength of the electric field =?
d is the distance = 0.020 m
q is the charge= 12 µc =12 ×10⁻⁶C
The electric field strength is given by;
[tex]E = \frac{Kq}{d^2} \\\\E = \frac{9 \times 10^9\times 12 \times 10^{-6}}{(0.020)^2} \\\\E = 2.7 \times 10^8 N/C[/tex]
Hence the strength of the electric field will be 2.7 x 108 N/C.
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Answer B is right or 2.7 × 108 N/C
Explanation:
How can an electrical current produce a magnetic field, and how can a magnetic field produce an electrical current?.
Answer:
As Ampere suggested, a magnetic field is produced whenever an electrical charge is in motion. The spinning and orbiting of the nucleus of an atom produces a magnetic field as does electrical current flowing through a wire. The direction of the spin and orbit determine the direction of the magnetic field.
Explanation:
hope this helps
pls mark as brainliest
What happens within the motor when an electric current flows through the loop of a wire
Answer: I think its B: The loop becomes electromagnetic, which causes the loop to flip and produce mechanical energy.
Explanation:
Define heat capacity of a substance.
Write the S.I unit of heat capacity.
Define heat capacity of a substance:
The heat capacity of a substance can be defined as the amount of heat required to change its temperature by one degree.Write the S.I unit of heat capacity:
Joule per Kelvin[tex] \: \: \: [/tex]
Joule per Celsius[tex] \: \: \: [/tex]
[tex] \: \: \: [/tex]
[tex] \: \: \: [/tex]
[tex] \: \: \: [/tex]
[tex] \: \: \: [/tex]
[tex] \: \: \: [/tex]
[tex] \: \: \: [/tex]
[tex] \: \: \: [/tex]
-,-
challenge
3. A car accelerates at a constant rate from 15 m's to 25 m/s while it
travels a distance of 125 m. How long does it take to achieve the final speed?
Answer:
6.25 second
Explanation:
we know that
s= (u+v)/2*T
125=20t
t=6.25 second
plz mark as brainalist
Rows on the periodic table are known as
Columns
O Families
O Rows
O Periods
Answer:
periods
Explanation:
The answer is periods i googled it
A sound wave is produced when a medium begins to.
Explanation:
Sound is produced when an object vibrates, creating a pressure wave. This pressure wave causes particles in the surrounding medium (air, water, or solid) to have vibrational motion. As the particles vibrate, they move nearby particles, transmitting the sound further through the medium.
I hope you understand...
can you please mark my answer brainliest ♥️...
Answer:
vibarate
Explanation:
A 1000 kg mass car moved in a straight, horizontal motion, with a speed of 20m / s, when it was involved in an accident. It was subjected for 0.1s to an intense force, coming to rest after that time interval, any time. is the mean value of the modulus of this resulting force?
Answer:
average value of the resulting force
Explanation:
The average module value of this resulting force is equivalent to 2.0. 10⁵ N.
The impulse of a force can be calculated by the product of the intensity of the force applied by the time interval in which it is applied -
I = F.Δt
Where,
F = Strength in Newtons
Δt = time interval in seconds
I = Impulse in N.s
The impulse of a force is equivalent to the variation of the amount of movement it causes in the body.
I = ΔQ
The amount of movement is a vector quantity that results from the multiplication of the mass of a body by its speed. Its direction and direction are the same as the velocity vector of the body.
Q = m-V
As the car goes to rest after the application of force, the amount of final movement of the car is equivalent to zero.
I = 0 - mV
F. Δt = - mV
F. 0,1 = - 1000. 20
F = - 20000/0,1
F = 200,000 N
F = 2,0. 10⁵ N
Calculate the momentum on an object that has a mass of 150 kg and a velocity of 24 m/s no decimal in your answer
Question :-
Calculate the Momentum of an object that has a mass of 150 Kg and a Velocity of 24 m/s .Answer :-
Momentum is 3600 Kg m/s .Explanation :-
As per the provided information in the given question, we have been given that the Mass of the object is 150 Kg . Its Velocity is given as 24 m/s . And, we have been asked to calculate the Momentum of object .
For calculating the Momentum , we will use the Formula :-
[tex] \bigstar \: \: \boxed{ \sf{ \: Momentum \: = \: Mass \: \times \: Velocity \: }} [/tex]
Therefore , by Substituting the given values in the above Formula :-
[tex] \dag \: \: \: \sf { Momentum \: = \: Mass \: \times \: Velocity } [/tex]
[tex] \longmapsto \: \: \sf { Momentum \: = \: 150 \: \times \: 24 } [/tex]
[tex] \longmapsto \: \textbf {\textsf { Momentum \: = \: 3600 \: Kg m/s }} [/tex]
Hence :-
The Momentum of the object is 3600 Kg m/s .[tex] \underline {\rule {180pt} {4pt}} [/tex]