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

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The Answer of 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

A 25-Kg Ball and a 5