Rotational Motion Short Quiz (20 items)

What is the formula for torque?

• Torque = Force x Distance

• Torque = Work / Time

• Torque = Mass x Acceleration

• Torque = Pressure x Area

What is the relationship between torque and angular acceleration?

• Torque and angular acceleration are inversely proportional to each other.

• Torque and angular acceleration are directly proportional to each other.

• Angular acceleration causes torque.

• Torque has no effect on angular acceleration.

How is moment of inertia defined?

• Measure of an object's resistance to changes in its rotation

• Measure of an object's ability to float in water

• Measure of an object's electrical conductivity

• Measure of an object's resistance to changes in its linear motion

What is the formula for rotational kinetic energy?

• 1/2 * I * ω^2

• 1/3 * I * ω^3

• I * ω

• 2 * I * ω^2

What is the principle of conservation of angular momentum?

• Total angular momentum of a system remains constant if no external torque is applied.

• Angular momentum is not related to the motion of a system

• Total angular momentum of a system increases with external torque

• Angular momentum decreases with external torque

What are the conditions for rotational equilibrium?

• Sum of torques must be zero and object must be rotating

• Sum of torques must be non-zero and object must be rotating

• Sum of torques must be zero and object must not be rotating

• Sum of forces must be zero and object must not be rotating

What is the SI unit of torque?

• N⋅m

• Watt

• Kg⋅m

• Joule

How does the moment of inertia affect the rotational motion of an object?

• It makes the object move in a straight line

• It affects the object's resistance to changes in its rotational motion.

• It causes the object to speed up its rotational motion

• It has no effect on the rotational motion

What is the formula for angular momentum?

• L = 1/2 Iω^2

• L = Fd

• L = mv^2

• L = Iω

Explain the concept of rotational kinetic energy.

• Energy due to an object's expansion

• Energy due to an object's linear motion

• Energy due to an object's stillness

• Energy due to an object's rotation around an axis