ROTATIONAL MOTION

What is the magnitude of torque when force is applied parallel to the position vector?

• Maximum
• Half of maximum
• Depends on force
• Zero

When is torque maximum for a given force on a rotating body?

• When force is parallel to r
• When force is at 45° to r
• When force is perpendicular to position vector
• When force is opposite to r

What is the direction of the angular velocity vector for a body rotating about a fixed axis?

• Tangential to the path
• Radially outward
• Along the circumference
• Along the axis of rotation

In the expression v = ω × r, what does r represent?

• Radius of gyration
• Distance from center of mass
• Position vector from origin to particle
• Centripetal vector

Which physical quantity is defined as the time rate of change of angular velocity?

• Linear acceleration
• Angular displacement
• Velocity
• Angular acceleration