Rotational Motion

What is angular velocity?

• Angular velocity is the distance between two points on a circle

• Angular velocity is the force acting on a rotating object

• Angular velocity is the rate of change of angular displacement with respect to time.

• Angular velocity is the speed of light in a vacuum

Define torque in the context of rotational motion.

• Torque is unrelated to force

• Torque is only applicable to stationary objects

• Torque is the measure of the force that can cause an object to rotate around an axis.

• Torque is a measure of linear motion

Explain the concept of moment of inertia.

• Moment of inertia is a measure of an object's resistance to changes in its linear speed.

• Moment of inertia is a measure of an object's resistance to changes in its rotation speed.

• Moment of inertia is a measure of an object's resistance to changes in its mass.

• Moment of inertia is a measure of an object's resistance to changes in its shape.

How is rotational kinetic energy calculated?

• KE = 0.5 * I * ω^2

• KE = 0.5 * I * ω

• KE = 0.5 * I * ω^3

• KE = I * ω^2

What is angular acceleration and how is it related to angular velocity?

• Angular acceleration is the rate of change of linear velocity over time.

• Angular acceleration is the same as linear acceleration.

• Angular acceleration is the rate of change of angular velocity over time.

• Angular acceleration is not related to angular velocity.

What is the SI unit of angular velocity?

• revolutions/minute

• degrees/second

• meters/second

• radians/second

How does torque affect the rotational motion of an object?

• Torque causes an object to move in a straight line

• Torque causes an object to shrink in size

• Torque causes an object to rotate around an axis.

• Torque has no effect on the rotational motion of an object

Describe the relationship between moment of inertia and the distribution of mass in an object.

• Moment of inertia is only related to the shape of an object, not the mass distribution.

• Moment of inertia is directly related to the distribution of mass in an object.

• Moment of inertia is not affected by the distribution of mass in an object.

• Moment of inertia is inversely related to the distribution of mass in an object.

What is the formula for calculating rotational kinetic energy?

• KE = 0.5 * I * ω

• KE = 0.5 * I * ω^2

• KE = 0.5 * I * ω^3

• KE = I * ω^2

How does angular acceleration differ from linear acceleration?

• Angular acceleration involves linear motion, while linear acceleration involves rotational motion.

• Angular acceleration is faster than linear acceleration.

• Angular acceleration is not affected by the direction of motion, unlike linear acceleration.

• Angular acceleration involves rotational motion, while linear acceleration involves straight-line motion.