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A ball of mass 10 kg is moving with a velocity of 10 m/s. It strikes another ball of mass 5 kg which is moving in the same direction with a velocity of 4 m/s. If the collision is elastic, their velocities after the collision will be, respectively
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Correct option is A
v1=m1−m2m1+m2 u1+2m2m1+m2 u2 andv2=2m1m1+m2 u1+m1−m2m1+m2 u2on putting the values v1=6 m/s and v2=12 m/s
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A ball is projected vertically down with an initial velocity from a height of 20 m onto a horizontal floor. During the impact it loses 50% of its energy and rebounds to the same height. The initial velocity of its projection is (in m/s) [Take g = 10 m/s2]
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