Questions
A body of mass 2 kg makes an elastic collision with another body at rest and continues to move in the original direction with one fourth of its original speed. The mass of the second body which collides with the first body is
detailed solution
Correct option is B
m1=2 kg and v1=m1−m2m1+m2 u1=u14 (given)By solving we get m2=1.2 kgSimilar Questions
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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