Rotational Motion Review

The figure shows scale drawings of four objects, each of the same mass and uniform thickness, with the mass distributed uniformly. Which one has the greatest moment of inertia when rotated about an axis perpendicular to the plane of the drawing at point P?

• A

• B

• C

• rotational inertiaD

A solid sphere, solid cylinder, and a hollow pipe all have equal masses and radii. If the three of them are released simultaneously at the top of an inclined plane and do not slip, which one will reach the bottom first?

• cylinder

• pipe

• sphere

• They all reach the bottom at the same time.

Tags

NGSS.HS-PS3-2

A person sits on a freely spinning lab stool that has no friction in its axle. When this person extends her arms,

• her moment of inertia increases and her angular speed decreases.

• her moment of inertia decreases and her angular speed increases.

• her moment of inertia increases and her angular speed increases.

• her moment of inertia increases and her angular speed remains the same.

A rod of length L rotates about a fixed axis that is located at the end of the rod. Which of the following is equal at all points on the rod?

• θ, F_c

• θ, ω, α

• ω, ν_t

• F_c, a_c

The rate at which a rotating object spins is called ____.

• linear motion

• angular velocity

• radians

• acceleration

What is torque?

• Torque is a measure of the linear force applied to an object.

• Torque is a unit of temperature measurement.

• Torque is a type of musical instrument.

• Torque is a measure of the force that tries to rotate around an axis

The time taken for one complete circuit is called the... 

• Period

• Frequency 

• Angular velocity

Tags

NGSS.HS-PS4-1

You feel "heaviest" at the ___ of a loop because normal force is ____ gravitational force.

• Top; Equal to

• Bottom; Equal to

• Top; Greater than

• Bottom; Greater than

Tags

NGSS.HS-PS2-1

• angular displacement

• angular velocity

• angular acceleration