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An aeroplane is moving with a velocity u...

An aeroplane is moving with a velocity u. It drops a packet from a height h. The time t taken by the packet in reaching the ground will be

A

`sqrt(((2g)/(h)))`

B

`sqrt(((2u)/(g)))`

C

`sqrt(((h)/(2g)))`

D

`sqrt(((2h)/(g)))`

Text Solution

Verified by Experts

The correct Answer is:
D
The initial velocity of airoplane is horizontal. Hence, the vertical component of velocity of packet will be zero.
`therefore h=(1)/(2)g t^(2)`
`rArr t=sqrt((2h)/(g))`
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DC PANDEY-MOTION IN A PLANE-Check point 3.5
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