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Physics
A body y of a mass 5kg moves with a velocity of 30ms-1 collides with another body x moving opposite direction with velocity of 20ms-1 if both bodies now moves in the directiom of motion of y of a velocity of 10ms-1 calculate the mass of x.
1 answer
momentum is conserved
(5 * 30) - (x * 20) = (5 + x) * 10
solve for x
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