A stone is released at rest from a height of 45 m above the horizontal level ground. There is horizontal wind blowing due to which stone acquires an additional (in addition to accleration due to gravity) horizontal accleration of magnetic `10 m//s^(2)`. Then the net distance travelled by stone before reaching ground is : (Take `g = 10 m//s^(2)` and nelect air resistance)

Options

A. 45 m
B. `45 sqrt(2)m`
C. `45 sqrt(3) m`
D. Cannot be determined

Answer

B

Explanation

`AO = 45 m, AB = 45 sqrt(2)`
net acceleration makes `45^(@)` with horizontal
Since `u =0`
The stone moves along AB
`:.` Net distance travelled before reaching ground is `= 45 sqrt(2)m`