# Newtons laws

A 31.0 kg gun is resting on a frictionless surface. The gun fires a 50.0 g bullet with a muzzle velocity of 306.0 m/s. Assume that air resistance is negligible.

(a) Calculate the momenta of the bullet and the gun after the gun is fired.

kg·m/s (bullet)

kg·m/s (gun)

(b) Calculate the kinetic energy of both the bullet and the gun just after firing.

J (bullet)

J (gun

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#### Solution Preview

The problem is based on the third law of Newton. "Every action has an equal and opposite reaction". In such a process the total momentum is conserved. In mathematical form Because momentum of the ...

#### Solution Summary

This problem illustartes an application of thet third law of newton. The conversion of momentum , energy etc are demonstrated

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