Archives

A massive disc of radius R is moved with a constant velocity m on a frictionless table. Another small disc collides with it elastically with a speed ofv0=0.3m/s, the velocities of the discs being parallel. The distance (shown in the figure) is equal to R/2, friction between the discs is negligible. For which u (in m/s) will the small disc move perpendicularly to its original motion after the collision?

An elastic collision is a collision in which there is no net loss in kinetic energy in the system as a result of the collision. Both momentum and... View Article