ROTATIONAL MOTION

What is the vector nature of angular displacement for infinitesimal dθ?

• It is radial
• It is tangential
• It is scalar
• It is axial and along the rotation axis

How is the net torque related to angular acceleration?

• τ = Iω
• τ = F/r
• τ = Iα
• τ = dL/dt

What is the implication of a rigid body having no internal motion?

• It cannot rotate
• It has zero moment of inertia
• Work done by external torques changes kinetic energy only
• It has constant angular velocity

What is the role of the tangent in calculating work done?

• It measures torque
• It defines radial distance
• It defines the direction of displacement
• It determines angular speed

Why is the z-axis chosen as the rotation axis in the analysis?

• Because it lies in the plane
• Because it is horizontal
• Because it is perpendicular to the plane of motion
• Because it is arbitrary