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

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