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A body of mass 2 kg makes an elastic col...

A body of mass 2 kg makes an elastic collision with a second body at rest and continues to move in the original direction but with one fourth of its original speed. What is the mass of the second body?

A

1.0 kg

B

1.5 kg

C

1.8 kg

D

1.2 kg

Text Solution

Verified by Experts

The correct Answer is:
D

COM gives: `2v_0 = 2 xx (v_0)/4 + mv" "` ...(i)
For elastic collision `v - (v_0)/4 = v_0" "…..(ii)`
From (i) and (ii) `m = 12 kg`.
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