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A ball of mass 0.1kg makes an elastic head on collision with a ball of unknown mass,initially at rest .if the 0.1kg ball rebounded at one third of its original speed, what is the mass of the other ball?

A ball of mass 0.1kg makes an elastic head on collision with a ball of unknown mass,initially at rest .if the 0.1kg ball rebounded at one third of its original speed, what is the mass of the other ball?

Grade:11

1 Answers

Arun
25750 Points
6 years ago
For elastic collision
Let V1 initial = v
V1(final) = (m1-m2)* V/(m1+m2)
Then V1(final) = V/3
 
V/3 = (0.1-m2) *V/(0.1+m2)
0.1 + m2 = 0.3 - 3 m2
4m2 = 0.2
m2 = 0.05 kg

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