Understanding Rotational Motion Concepts

What is the unit of torque in the International System of Units (SI)?

• Newton

• Joule

• Newton-meter

• Watt

Which of the following best describes rotational inertia?

• The resistance of an object to change its linear velocity

• The resistance of an object to change its rotational motion

• The force required to rotate an object

• The energy stored in a rotating object

If the torque applied to an object is doubled, what happens to the angular acceleration, assuming rotational inertia is constant?

• It is halved

• It remains the same

• It is doubled

• It is quadrupled

• Rotational inertia is independent of mass distribution

• Rotational inertia decreases with more mass concentrated at the center

• Rotational inertia increases with more mass concentrated at the center

• Rotational inertia increases with more mass distributed farther from the axis of rotation

Which of Newton's laws is most directly related to rotational motion?

• Newton's First Law

• Newton's Second Law

• Newton's Third Law

• Newton's Law of Universal Gravitation

If an object is in rotational equilibrium, what can be said about the net torque acting on it?

• The net torque is positive

• The net torque is negative

• The net torque is zero

• The net torque is equal to the force applied

Which of the following factors does not affect the rotational inertia of an object?

• Mass of the object

• Shape of the object

• Distribution of mass relative to the axis of rotation

• Color of the object

Which of the following is a correct statement of Newton's Second Law for rotational motion?

If the radius of a rotating disk is doubled, how does this affect its rotational inertia, assuming mass remains constant?

• Rotational inertia is halved

• Rotational inertia remains the same

• Rotational inertia is doubled

• Rotational inertia is quadrupled