ROTATIONAL MOTION

What happens to the direction of angular momentum when a particle moves in a circular path but the origin is not on the axis?

• It always aligns
• It becomes zero
• It may not align with the rotation axis
• It reverses periodically

In the context of fixed-axis rotation, what does the vector sum Σ m_i (OC_i × v_i) represent?

• Total kinetic energy
• Net torque
• Linear momentum
• Net transverse angular momentum (L_⊥)

What is the significance of the term 'r⊥' in the expression v = ω r⊥?

• It measures angular displacement
• It accounts for friction
• It ensures only the effective rotational distance contributes to linear speed
• It determines mass

How does the angular momentum of a particle change if its distance from the rotation axis doubles?

• It halves
• It remains unchanged
• Its axial component increases by a factor of four
• It becomes zero

What determines whether the total angular momentum L aligns with the angular velocity vector ω?

• Color of the object
• External pressure
• Symmetry of mass distribution about the rotation axis
• Ambient temperature