law of conservation of momentum

Solution to problems – class 9 physics – Set 1 Q 57

Problem Statement 57) A ball X of mass 1 kg travelling at 2 m/s has a head-on collision with an identical ball Y at rest. X stops and Y moves off. Calculate the velocity of Y after the collision. Solution Initial momentum of X = 1×2 kg m/s = 2 kg m/s …………….(i) After collision […]

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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