A Solid Wood Door, 90

Multiple Choice

A solid wood door, 90.0 cm wide by 2.00 m tall has a mass of 35.0 kg. It is ajar and at rest. A ball with a mass of 500 g is thrown perpendicular to the door with a speed of 20.0 m/s and hits the door 60.0 cm from the hinged side. The ball rebounds with a speed of 16.0 m/s along the same line. How much energy is lost in the process?

A) 29.8 J
B) 16.3 J
C) 14.9 J
D) 12.7 J
E) 4.79 J