Question

A body is thrown horizontally from the top of a tower of height 5 m. It hits 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. 2.5 ms^-1
• B. 5 ms^-1
• C. 10 ms^-1
• D. 20 ms^-1

Answer 1

The correct option is C

10 ms^-1

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