ROTATIONAL MOTION Quiz

• The system is at rest
• Torque is infinite
• The total angular momentum does not change with time
• Angular velocity is zero

• External forces dominate
• Internal forces are zero
• Internal forces cancel in torque due to being central
• The system is in equilibrium

• It increases with time
• It decreases to zero
• It changes direction periodically
• It remains constant about any fixed point

• Direction of r only
• Direction of F only
• Left-hand rule
• The right-hand rule applied to r × F

• It implies time symmetry
• It implies translational symmetry
• It implies charge symmetry
• Space is symmetric under rotation about those axes