GUN FIRE A BULLET WITH VELOCITY v MASS OF BULET IS m MASS OF GUN IS M ND IT RERCOIL WITH V WHC HAVE MORE KE ND WHY?

Question

FRM WORK ENERGY POWER

Answer 1

The conservation of energy tells us that energy conserved. Thus, the energy of the recoil is equal and opposite the energy of the bullet. Since the gun has a larger mass, then it must compensate by having a smaller velocity; and since the bullet has a smaller mass, then it must compensate by having a larger velocity.

 

Since velocity is squared with KE (0.5mv²), then the bullet will have a higher KE than the gun.