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A plane flying horizontally at 100 m s^-...

A plane flying horizontally at `100 m s^-1` releases an object which reaches the ground in `10 s`. At what angle with horizontal it hits the ground ?

A

`55^@`

B

`45^@`

C

`60^@`

D

`75^@`

Text Solution

Verified by Experts

The correct Answer is:
B
(b) `v_x = u_x = 100 ms6^-1, v_y = u_y + a_y t = 0 + 10 xx 10`
`tan theta = (v_y)/(v_x) = (100)/(100) = 1 rArr theta = 45^@`.
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