Question

A ball is thrown vertically up with a speed $40\text{m/s}$. The speed of ball, at a height $10\text{m}$ will be

• A. $37.4\text{m/s}$
• B. $21.4\text{m/s}$
• C. $19.6\text{m/s}$
• D. $8.1\text{m/s}$

Answer 1

The correct option is A $37.4\text{m/s}$

Using equation of motion,

$v^2=u^2-2gh={40}^2-2\times 10\times 10$

$v=37.4\text{m/s}$