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The speed of a projectile at its maximum...

The speed of a projectile at its maximum height is half of its initial speed. The angle of projection is .

A

`60^@`

B

`15^@`

C

`30^@`

D

`45^@`

Text Solution

Verified by Experts

The correct Answer is:
A
Let v be velocity of a projectile at maximum height H.

`v = u cos theta`
According to given problem, `v = (u)/2`
`:. u/2 = u cos theta implies cos theta =1/2 implies theta = 60^@`
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