Taking off rocket can be explained by __________________?
Correct answer: C. Law of conservation of momentum
- A. 1st law of motion
- B. 2nd law of motion
- C. Law of conservation of momentum
- D. law of conservation of energy
Explanation
A rocket ejects hot gases backward, and the total momentum of the rocket-gas system remains conserved. The backward momentum of the gases is balanced by equal forward momentum of the rocket, causing take-off. Newton's third law is closely related, but conservation of momentum is the principle directly described by this option.
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About Linear Momentum
Linear momentum is the vector product of mass and velocity, p = mv, and changes when a net external force acts. Work includes impulse as the change in momentum, conservation of momentum in isolated systems, collisions and explosions, and the distinction between elastic, inelastic and perfectly inelastic collisions.
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