Free Printable AP Physics 1 - Torque & Rotational Motion Review (Unit 7)

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AP Physics 1 - Torque & Rotational Motion Review (Unit 7)

Total questions: 38

Worksheet time: 28mins

Name

Class

Date

The figure above shows a uniform meterstick that is set on a fulcrum at its center. A force of magnitude F toward the bottom of the page is exerted on the meterstick at the position shown. At which of the labeled positions must an upward force of magnitude 2F be exerted on the meterstick to keep the meterstick in equilibrium?

The broomstick shown is in static equilibrium. The torque due to the mass to the right of the person's finger is ____________ compared to the torque due to the mass to the left of the person's finger.

less

equal

None of the above

The broomstick shown is in static equilibrium. The mass to the right of the person's finger is ____________ compared to the mass to the left of the person's finger.

less

equal

None of the above

"A point at which entire weight of object concentrated toward the earth".

Identify the concept explained in the statement above.

Free body diagram

Concurrent forces

Center of gravity

Rigid body

If the fulcrum is on the hinge in the picture, which of the following forces are not creating torque.

Normal force from the wall

Weight from the rod

Tension from the string.

Lever arm is another word for all of the following except

the position where a torque is applied.

the distance from the fulcrum.

the length of a rod.

perpendicular distance from rotational axis.

The figure above shows a uniform meterstick that is set on a fulcrum at its center. A force of magnitude F toward the bottom of the page is exerted on the meterstick at the position shown. At which of the labeled positions must an downward force of magnitude F/2 be exerted on the meterstick to keep the meterstick in equilibrium?

What does $\alpha\$ (alpha) represent?

angular displacement

angular velocity

angular acceleration

Which of the following describes how fast you are spinning or rotating about an axis?

linear speed

angular displacement

angular speed

linear acceleration

10.

According to convention, counter-clockwise is always considered the ______________ direction when rotating.

positive

negative

zero

11.

If net force causes a change in velocity, then a net torque causes a ...

change in angular velocity.

change in angular position.

change in position.

change in linear momentum.

12.

The angular acceleration unit is

$\frac{rad}{s^2}$

$\frac{m}{s^2}$

$\frac{rad}{m^2}$

$\frac{N}{s^2}$

13.

How many radians are there in one complete rotation?

$\pi$

$2$

$1$

$2\pi$

14.

If you analyze points farther radially outwards from the center of a rotating object, the angular velocity and angular acceleration are

increasing.

decreasing.

remaining the same.

15.

If you analyze points farther radially outwards from the center of a rotating object, the linear/tangential velocity and linear/tangential acceleration are

increasing.

decreasing.

remaining the same.

16.

If an object has a positive $\omega$ and a positive $\tau$ , then what is the object doing?

rotating clockwise and speeding up

rotating counterclockwise and speeding up

rotating clockwise and slowing down

rotating counterclockwise and slowing down

17.

If an object has a negative $\omega$ and a positive $\tau$ , then what is the object doing?

rotating clockwise and speeding up

rotating counterclockwise and speeding up

rotating clockwise and slowing down

rotating counterclockwise and speed up

18.

An object is spinning counterclockwise and experiences a negative torque. Which of the following are true?

The object will immediately stop and start spinning clockwise at an increasing rate.

The object will eventually stop and start spinning clockwise, but it may take some time to slow down.

The object will never stop. It will keep spinning counterclockwise indefinitely at the same speed.

The object will never stop. It will keep spinning clockwise indefinitely but at an increasing speed.

19.

True or False: If the net torque is non-zero, the system is accelerating.

True

False

20.

Select the best answer for the following statement:

If the net torque is zero, the object is not rotating.

Always

Sometimes

Never

21.

Given the linear acceleration ( $a$ ), how can you find angular acceleration ( $\alpha$ )?

Divide by $r$

Multiply by $r$

Use a kinematic equation

22.

Given the angular velocity ( $\omega$ ), how can you find linear velocity ( $v$ )?

Divide by $r$

Multiply by $r$

Use a kinematic equation

23.

Which of the following equations are not on your equation sheet, but you should know them very well?

$\frac{a}{r}=\alpha$

$\frac{v}{r}=\omega$

$\frac{x}{r}=\theta$

All of the above. Dang i really need to remember these

24.

In an earth-ball system, the ball is rolling down a hill. At the bottom of the hill what type(s) of energy does it have?

potential of a spring

potential due to gravity

translational kinetic energy

rotational Kinetic energy

25.

An object sliding down a frictionless incline will reach the bottom _____________ than a rolling object released from the same height.

in more time

in less time

with more kinetic energy

with less kinetic energy

26.

True or False: Angular momentum is always conserved for orbiting objects if the external torque is zero.

True

False

27.

As a planet gets farther away from its star, its speed will ___________ and its total momentum & total energy will ___________.

decrease, increase

increase, decrease

decrease, remain the same

remain the same, decrease

28.

True or False: Objects moving in a straight line may have angular momentum.

True

False

29.

In one situation, you apply a force F for 5 seconds to a hanging wheel with moment of inertia I. Then you repeat the same experiment with a wheel of moment of inertia 3I, how would the change in angular momentum compare?

Bigger than before

Smaller than before

Same as before

30.

What will the area of a torque vs time graph give you?

Change in rotational kinetic energy

Net force

Net torque

Change in angular momentum

31.

What will the slope of an angular momentum vs time graph give you?

Change in rotational kinetic energy

Net force

Net torque

Change in angular momentum

32.

When a satellite extends its solar panels away from the axis of rotation its angular velocity _____________ and angular momentum _____________ because the rotational inertia _____________ .

stays the same, decreases, stays the same

decreases, stays the same, increases

decreases, decreases, increases

increases, stays the same, decreases

33.

To calculate the change in angular momentum, you can use which of the following sets of data?

Rotational inertia and change in angular velocity

Torque & rotational inertia

Change in angular velocity & duration of time

Torque (or average torque) & duration of time

34.

An object that is rolling without slipping must have

kinetic energy due to translational motion

kinetic energy due to rotational motion

potential energy due to gravity

potential energy due to a compressed/stretched spring

35.

Which of the following has the greatest rotational inertia?

hollow sphere

solid cyylinder

hollow cylinder

solid sphere

36.

What is the equation for the angular momentum of a point object moving in a straight line?

$I\omega$

$mvr$

$\tau\Delta t$

$Fr\sin\theta$

37.

What is the rotational inertia of a point mass?

$\frac{MR^2\ }{2}$

$\frac{2MR^2}{5}$

$MR^2$

38.

Which of the following is another way to say that momentum is conserved in a collision?

The amount of energy lost by one object equals the amount of energy gained by the other object.

The amount of momentum lost by one object equals the amount of momentum gained by the other object.

The amount of velocity lost by one object equals the amount of velocity gained by the other object.

The amount of speed lost by one object equals the amount of speed gained by the other object.

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AP Physics 1 - Torque & Rotational Motion Review (Unit 7)

Total questions: 38

Worksheet time: 28mins

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