ROTATIONAL MOTION

What is the role of the center C in the circular motion of a particle?

• It is the center of mass
• It is arbitrary
• It is the center of the circular path and lies on the axis
• It moves with the particle

What is the effect of doubling angular velocity on rotational kinetic energy?

• It doubles
• It halves
• It quadruples the kinetic energy
• No effect

What is the expression for power when torque and angular velocity are known?

• P = τ/ω
• P = τ²ω
• P = τω
• P = ω/τ

What is the significance of the rigid body assumption in rotational work?

• It allows deformation
• It makes mass zero
• It ensures same angular displacement for all particles
• It eliminates torque

What is the condition for zero torque?

• When force is perpendicular
• When α = 90°
• When force is parallel to radius vector
• When dθ = 0