A) mass
B) energy
C) momentum
D) velocity
Correct Answer: C
Solution :
| [c] Rocket works on the conservation of momentum. In a rocket, the fuel burns and produces gas at high temperature. These gases are ejected out of the rocket from a nozzle at the back side of the rocket. The ejecting gas exerts a forward force on the rocket which helps in accelerating. |
| Though the mass of gases escaping per second is very small and their momentum is very large due to their tremendous velocity of escape. |
| An equal and opposite momentum is imparted to the rocket which despites its large mass builds up a high velocity. |
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