A bomb is released from an aeroplane flying at a speed of `720 km//h` in the horizontal direction `8000 m` above the ground. At what horizontal distance from the initial position of areoplane it strikes the ground.

Explanation

According to the figure, during motion of the bomb from O to B
`u = 720 xx (5)/(18) = 200 ms^(-1) rArr y = h =(1)/(2) g t^(2)`
`rArr 8000 = (1)/(2) xx 10 t^(2) rArr t = 40 s`
`rArr x = ut = 200 xx 40 = 8000m`