Question

A body of mas 'm' moving with speed 3 m/s collides with a body of mass '2m' at rest. The coalesced mass will start to move with a speed of ______.

Options

• 3 m/s

• 1 m/s

• 6 m/s

• 9 m/s

Answer 1

A body of mas 'm' moving with speed 3 m/s collides with a body of mass '2m' at rest. The coalesced mass will start to move with a speed of 1 m/s.

Explanation:

v(m₁ + m₂) = m × 3 + 0

`therefore "v" =(3m)/(m+2m)= 1  `m/s