For a perfectly elastic collision between two identical smooth spheres on a…
PHYSICS · Subjective · CBSE · Physics · Work, Energy and Power · Work, Energy and Power
Problem
For a perfectly elastic collision between two identical smooth spheres on a frictionless horizontal surface, one sphere of speed u strikes the other, which is at rest.
(i) Show that v12+v22=u2, where v1 and v2 are the speeds of the two spheres after the collision.
(ii) Hence prove that the velocities of the two spheres after the collision are perpendicular to each other.