Question

A particle is falling from height h calculate velocity when it strike to ground.

Answer 1

Solution

When a particle is falling free from height h then it's initial velocity is u=0

Here acceleration is gravitation acceleration g, let velocity is v at ground

Then using third equation of motion

$v^2=u^2+2as$

$v^2=0+2gh$

$v=\sqrt{2gh}$