Rotational Dynamics Torque
a year ago
coscephysics
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• Question 1
30 seconds
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Q.

If the net torque on an object is 0, then the object will

not rotate or rotate at a constant angular velocity.

rotate with a constant angular acceleration.

not rotate or move in a straight line.

not move in a straight line.

• Question 2
30 seconds
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Q.

If a net torque is applied to an object, that object will experience which of the following? (A net torque means a net torque that is NOT 0!)

A constant angular speed

A constant moment of inertia

An angular acceleration

An increasing moment of inertia

• Question 3
30 seconds
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Q.

Which of the following statements is correct?

The closer the force is to the axis of rotation, the easier it is to rotate the object.

The closer the force is to the axis of rotation, the more torque that is produced.

The farther the force is to the axis of rotation, the less torque that is produced.

The farther the force is to the axis of rotation, the more torque that is produced.

• Question 4
30 seconds
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Q.

At what angle should the force be applied to a wrench to produce the maximum torque?

00 to the handle

900 to the handle

1800 to the handle

3600 to the handle

• Question 5
30 seconds
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Q.

Suppose a doorknob is placed at the center of a door. Compared with a door whose knob is located at the edge, what amount of force must be applied to this door to produce the torque needed to open it?

1/4 as much

1/2 as much

Twice as much

Four times as much

• Question 6
30 seconds
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Q.

If you want to open a swinging door with the least amount of force, where should you push on the door?

As far from the hinges as possible

Close to the hinges

In the middle

It does not matter where you push

• Question 7
30 seconds
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Q.

If you cannot exert enough force to loosen a bolt with a wrench, which of the following should you do?

Exert a force on the wrench closer o the bolt

Tie a rope to the end of the wrench and pull

Use a wrench with a longer handle

Use a wrench with a shorter handle

• Question 8
30 seconds
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Q.

At which point along a claw hammer is the center of mass best located?

In the middle of the handle

Close to the end of the handle without the head

Close to the head end of the handle

• Question 9
30 seconds
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Q.

Which of the following affects the total kinetic energy of a football thrown with a spinning motion?

The ball's angular speed only

The ball's linear speed only

Both the linear and angular speeds

Neither the linear nor the angular speeds

• Question 10
30 seconds
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Q.

What is the point at which all of the mass of the body and be considered to be concentrated?

Center of Mass

Moment of Inertia

Rotational Equilibrium

Torque

• Question 11
30 seconds
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Q.

A point mass and a solid cylinder have the same mass and radius. How much more rotational kinetic energy does the point mass have than the solid cylinder if they are both spinning about their symmetry axes with the same angular speed?

Half as much

They have he same amount of rotational kinetic energy

Twice as much

Four times as much

• Question 12
30 seconds
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Q.

What must be true in order for an object to be in both translational and rotational equilibrium?

The acceleration is zero.

The angular acceleration is zero.

The acceleration and angular acceleration are zero.

The velocity and angular velocity are zero.

• Question 13
30 seconds
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Q.

What is defined as a twist or turn, which causes an angular acceleration?

Angular Momentum

Center of Mass

Force

Torque

• Question 14
30 seconds
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Q.

What is the measure of the resistance of an object to change its rotational motion?

Center of Mass

Moment of Inertia

Rotational Equilibrium

Torque

• Question 15
30 seconds
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Q.

Which of the following does NOT affect an objects moment of inertia?

Mass

Size

Shape

Way it is rotating

Rotational Velocity

• Question 16
30 seconds
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Q.

An ice skater is spinning in a circle with his arms extended out. He then brings his arms in, what happens to his rotational velocity?