Question

A body is thrown horizontally from the top of a tower of height 5 m. It touches the ground at a distance of 10 m from the foot of the tower. The initial velocity of the body is (g = 10 $m{s}^{-2}$)

• A. $2.5m{s}^{-1}$
• B. $5m{s}^{-1}$
• C. $10m{s}^{-1}$
• D. $20m{s}^{-1}$

Answer 1

The correct option is C $10m{s}^{-1}$

$S=u\times \sqrt{\frac{2h}{g}}\Rightarrow 10=u\sqrt{2\times \frac{5}{10}}\Rightarrow u=10m/s$