Physics 211
Lecture 7
Video Problem 2

Video Demonstration
Running time 3 mins, 21 seconds



 

Lecture 7, #2

PROBLEM DESCRIPTION

Two balls, masses m and 3m, are at rest a distance d apart. A spring of constant k and un-compressed length 3d is squeezed between the two balls. The balls are released and move apart as the spring un-compresses. Assume that the surface the balls are on is frictionless, and neglect air resistance.

Determine the ratio of the final kinetic energies of the two balls.