A Miniature,spring-Loaded,radio-Controlled Gun Is Mounted on an Air Puck

Multiple Choice

A miniature,spring-loaded,radio-controlled gun is mounted on an air puck.The gun's bullet has a mass of 5.00 g,and the gun and puck have a combined mass of 130g.With the system initially at rest,the radio-controlled trigger releases the bullet,causing the puck and empty gun to move with a speed of 0.500 m/s.Of the total kinetic energy of the gun-puck-bullet system,what percentage is in the bullet?

A) 50%
B) 96%
C) 3.4%
D) 100%