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2.5kg ball travelling with a speed of7.5m/s makes an elastic collision with another ball of1.5kg and travelling at the speed of3.0m/s in the same direction.-- What are the velocities of the balls immediately after collision?
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closed as too localized by Qmechanic♦, Mark Eichenlaub, David Zaslavsky♦ May 1 '12 at 18:13
This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. For help making this question more broadly applicable, see the FAQ.
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In an elastic collision the guiding principles are the conservation of momentum $$p_{1,before} + p_{2,before} = p_{1,after} + p_{2,after}$$ and the similarly the conservation of total kinetic energy. With both you can solve your problem easily. (I did not downvote but your question shows zero own effort which is not appreciated here, as the complete answer is contained in the first google hit to 'elastic collision'.) |
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