When two uniform spherical balls of equal mass but different diameters undergo a head-on collision, the rotation speeds of the balls change.

Question

Quizplus · Accepted Answer

In a head-on collision between two uniform spherical balls of equal mass but different diameters, only their linear velocities change due to conservation of momentum and energy; their rotation speeds (angular velocities) remain unchanged because there is no torque applied to change their rotational states.

When Two Uniform Spherical Balls of Equal Mass but Different