Question

A fruit is dropped from a height of 20 m. Find the velocity with which it would hit the ground.

• A. 40 m/s
• B. 50 m/s
• C. 20 m/s
• D. can't be evaluated

Answer 1

The correct option is C

20 m/s

Since, the acceleration is along the direction of motion, a = + 10 m/s² and initial velocity is zero.

Distance covered $s=20m$

Final velocity $v$ is given by
$v^2$​ = $u^2$​​ + 2as
$v^2$​ =​ 0 + 2 $\times$ 10 $\times$ 20​ = 400
$v=\sqrt{400}=20\frac{m}{s}$​