ROTATIONAL MOTION

What happens to a rotating body if net torque is zero?

• It stops immediately
• It accelerates
• It rotates with constant angular velocity
• It changes axis

Why is the cross product used in torque calculation?

• To make it scalar
• To reduce complexity
• Because it's always zero
• Because torque depends on the angle between force and position vector

What is the role of the perpendicular distance in torque calculation?

• It reduces friction
• It measures mass
• It determines the lever arm
• It indicates temperature

What determines the direction of angular acceleration?

• Mass distribution
• Axis length
• The rate of change of angular velocity
• Gravitational pull

How does the work-energy principle apply in rotational motion?

• Torque equals energy
• Work is always zero
• Work done by torque equals change in rotational kinetic energy
• Energy is not conserved