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  • Rocket works on the principle of conservation of (a) mass (b) energy (c) momentum (d) velocity

Rocket works on the principle of conservation of

(a) mass
(b) energy
(c) momentum
(d) velocity

Answers (1)

Ans. c

Sol.

For the motion of the rocket, hot gases get exhausted from the rocket and they apply thrust force on the rocket. If we consider rocket and the gases as a single body, then to conserve momentum: gases are pushed backwards and the rocket will be pushed forward. Suppose, you are sitting in a toy car and you jump in forwarding direction, the car will go backwards to conserve momentum. The same phenomena happen with rocket and exhausted gases.

Mass of the rocket is not conserved, the energy of the rocket is not conserved and velocity of the rocket is not conserved.

Hence, the correct answer is option C.

Posted by

Gurleen Kaur

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