Select the correct answer.

A bumper car with a mass of 200 kilograms traveling at a velocity of 3.5 meters/second collides with a stationary bumper car with a mass of 250 kilograms. If the two bumper cars stick and move together at a velocity of 2.3 meters/second, what is the kinetic energy of the system after the collision?


A.

4.5 × 102 joules

B.

6.0 × 102 joules

C.

8.7 × 102 joules

D.

1.2 × 103 joules