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The ceiling of a hall is 40m high. For m...

The ceiling of a hall is 40m high. For maximum horizontal distance, the angle at which the ball may be thrown with a speed of `56ms^(-1)` without hitting the ceiling of the hall is

A

`25^(@)`

B

`30^(@)`

C

`45^(@)`

D

`60^(@)`

Text Solution

Verified by Experts

The correct Answer is:
B
`H=((u sin theta)^(2))/(2g)` `sin theta=sqrt(2gH)/(u)=sqrt(2xx9.8xx40)/(56)=(1)/(2)rArr theta=30^(@)`
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ALLEN -MOTION IN A PALNE-EXERCISE-2
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