law of conservation of momentum

How do Rockets work?

How do rockets work? As the rocket engines operate, some kind of fuel (liquid or solid) is burnt. The engines continuously eject burned fuel gases. As these exhaust gases have both mass and velocity, they have some momentum as well. By the principle of conservation of momentum, the rocket’s momentum changes by this same amount […]

Solution to problems – physics class 9 – Set 1 Q 56

Problem Statement 56)A truck of mass 500 kg moving at 4 m/s collides with another truck of mass 1500 kg moving in the same direction at 2 m/s. What is their common velocity just after the collision if they move off together? Solution Total initial momentum = 500 x 4 + 1500 x 2 = […]

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