Question

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 120 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 0.500 m/s. What is the bullet's speed?
momentum is conserved

the momentum of the bullet is equal to the momentum of the puck/gun
... but in the opposite direction

(mass bullet) * (speed bullet) = (mass puck/gun) * (speed puck/gun)
12 J

Related Questions

A bullet with a mass of 5.00* 10^ -3 kg is loaded into a gun. The loaded gun has a mass of .52 kg. T... In a railroad yard, a 2.0×104 kg boxcar moving at 10m/s is brought to a stop by a spring-loaded bu... Two children are playing a game in which they try to hit a small box on the floor with a marble fire... Using the definition of work, get a job on the tension of the spring with a spring constant 300,0 H...