Question

A body of mass m moving with a constant velocity v hits another body is at rest, then velocity of the compound body after collision is

• A. v/2
• B. 2v
• C. v
• D. Zero

Answer 1

Answer: (A)

v/2

Answer 2

If initially second body is at rest then

Initial momentum = $m v$Final momentum = 2mV

By conservation of momentum $2 m V = m v$ ⇒ $V = \frac { v } { 2 }$