Question

For a given angle of projection, if the time of flight of a projectile is doubled, the horizontal range will increase to :

• A. four times
• B. thrice
• C. once
• D. twice

Answer 1

Answer: (A)

four times

Answer 2

The formula for time of flight and horizontal ray is given by as $g T^{2}=2 R \tan \alpha$ $\Rightarrow R \propto T^{2} \ldots$ (l) From the relation (1), if $T$ is doubled then $R$ will be four times