Question

When a molecule of a gas collides with the wall of a container it gets rebound and the momentum transferred to wall is equal to ___.

• A. $2mv$
• B. $mv$
• C. $m{v}^2$
• D. $\frac{1}{2}m{v}^2$

Answer 1

The correct option is A

$2mv$

If 'm' is mass and 'v' is velocity. Then momentum before impact = mv

Momentum after impact = -mv

Change in Momentum= mv - (-mv) =2mv.