ROTATIONAL MOTION

What is the relationship between angular acceleration α and angular velocity ω?

• α = ω/t
• α = dθ/dt
• α = dω/dt
• α = rω

What is the effect of a constant torque on a rotating rigid body?

• It stops the body
• It causes uniform rotation
• It produces constant angular acceleration
• It changes mass

How does the work done by torque depend on the path of rotation?

• It depends on speed
• It depends on mass
• It depends only on the total angular displacement if torque is constant
• It is always zero

What is the main assumption behind using τ = Iα for a rigid body?

• It is in free space
• It has zero mass
• The body is rigid and rotates about a fixed axis
• It is under gravity

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

• Tangential
• Radial
• Along the axis of rotation
• Perpendicular to force