Question

A cricketer can throw a ball to a maximum horizontal distance of 100 m. The speed with which he throws the ball is (to the nearest integer):

• A. $30m{s}^{-1}$
• B. $\text{42 }m{s}^{-1}$
• C. $32m{s}^{-1}$
• D. $\text{35 }m{s}^{-1}$
• E. $\text{40 }m{s}^{-1}$

Answer 1

Answer: (A)

$R=\frac{u^2}{g}\Rightarrow u=\sqrt{Rg}=30m{s}^{-1}$