1.

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 beA. `sqrt(((2g)/(h)))`B. `sqrt(((2u)/(g)))`C. `sqrt(((h)/(2g)))`D. `sqrt(((2h)/(g)))`

Answer» Correct Answer - 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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