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A ball is thrown straight upward with a ...

A ball is thrown straight upward with a speed v from a point h meter above the ground. The time taken for the ball to strike the ground is

A

`(v)/(g)[1 +sqrt(1+(2hg)/(v^(2)))`

B

`(v)/(g)[1 -sqrt(1+(2hg)/(v^(2)))`

C

`(v)/(g)[1 -sqrt(1-(2hg)/(v^(2)))`

D

`(v)/(g)[2 +sqrt(1-(2hg)/(v^(2)))`

Text Solution

Verified by Experts

The correct Answer is:
A
`h = -vt + (1)/(2)gt^(2), gt^(2) - 2vt -2h =0`
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