Question

A block of mass 'm' moving along a straight line with constant velocity `3vec"v"` collides with another block of same mass at rest. They stick together and move with common velocity. The common velocity is ______.

Options

• `(3vec"v")/2`

• `3vec"v"`

• `vec"v"`

• `2vec"v"`

Answer 1

A block of mass 'm' moving along a straight line with constant velocity `3vec"v"` collides with another block of same mass at rest. They stick together and move with common velocity. The common velocity is `underline((3vec"v")/2)`.

Explanation:

(m + m)v₂ = m × 3v

`"v"_2=3/2vec"v"`