A 400 Kg Object Is Moving at 5

Multiple Choice

A 4.00 kg object is moving at 5.00 m/s NORTHWEST. It strikes a 6.00 kg object that is moving SOUTHWEST at 2.00 m/s. The collision is perfectly inelastic. The kinetic energy lost in the collision is

A) 20.4 J.
B) 28.7 J.
C) 34.8 J.
D) 40.2 J.
E) 45.1 J.