A 25-Kg Ball and a 5

Multiple Choice

A 2.5-kg ball and a 5.0-kg ball have an elastic collision. Before the collision, the 2.5-kg ball was at rest and the other ball had a speed of 3.5 m/s. What is the kinetic energy of the 2.5-kg ball after the collision?

A) 1.7 J
B) 3.4 J
C) 8.1 J
D) 14 J
E) 27 J