A body is thrown horizontally from the top of a tower of 5 m height. It touches the ground at a distance of 10 m from the foot of the tower. The initial velocity of the body is

Options

A. `2.5ms^(-1)`
B. `5 ms^(-1)`
C. `10 ms^(-1)`
D. `20ms^(-1)`

Explanation

Range,`R=(u^2sin2 theta)/g`
`Rproptheta` ( `:.` u=constant)
R will be minimum when `theta` is minimum.
` :.P=15^(@)` will have shorest range.