ROTATIONAL MOTION Quiz

• Because it is too weak
• Because it always produces torque about points not on its line of action
• Only in vacuum
• Only if it is zero

• There is no difference
• A rigid body requires only torque balance
• A rigid body requires both force and torque balance, while a particle needs only force balance
• A particle requires torque balance

• It accelerates rapidly
• It stops rotating
• It remains stationary or moves uniformly while the body rotates about it
• It changes position randomly

• Because the needle is charged
• Because the field is weak
• Because the forces are unequal
• Because the forces on its poles form a couple due to separated lines of action

• Zero
• aF
• 2aF
• F/a