Question

A miniature spring-loaded, radio-controlled gun is mounted on an air puck. The gun's bullet has a mass of 7.00 g, and the gun and puck have a combined mass of 150 g. 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 0.530 m/s. What is the bullet's speed?

Answer 1

Answer:

Explanation:

Given

mass of bullet $m=7 gm$

mass of gun and Puck $M=150 gm$

speed of gun and Puck is $v=0.53 m/s$

Let speed of bullet be u

conserving Momentum

initial momentum=Final Momentum

$0=Mv+mu$

$u=-\frac{M}{m}v$

$u=-\frac{150}{7}\times 0.53=-11.35 m/s$          

negative sign indicates that bullet is moving in opposite direction