Question

When a bullet is fired from a rifle :

• A. The bullet has greater kinetic energy and greater momentum
• B. The bullet has less kinetic energy but greater momentum
• C. The bullet has less kinetic energy but more speed
• D. The bullet has more kinetic energy, but momenta of bullet and rifle are equal

Answer 1

The correct option is D The bullet has more kinetic energy, but momenta of bullet and rifle are equal

The momentum of both will be equal and in opposite direction due to law of conservation of momentum.

Since the velocity of bullet is much larger than the velocity of rifle . So , the KE of bullet is larger than rifle .