Question

a 10 kg object does head on with another 10 kg object at rest with velocity 5 metre per second find their velocity after collision in elastic
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Answer 1

Answer:

2.5 m/s

Explanation:

Let their common velocity be V

From law of conservation of momentum

Initial momentum = Final momentum

i.e. m1u1 + m2u2 = (m1+ m2)V

10 × 5 + 10 × 0 = (10+10)V

50= 20 × V

V = 50÷20

V = 2.5 m/s