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A ball is thrown vertically upwards. It ...

A ball is thrown vertically upwards. It returns 6 s later. Calculate (i) the greatest height reached by the ball and (ii) the initial velocity of the ball.

Text Solution

Verified by Experts

Total time = 6 s.
`therefore` It takes 3 s to go to greatest height.
`therefore` In 3 s, the final velocity becomes zero.
Use `v = u + at` and `v^2 = u^2 + 2as`
`u= 30 m s^(-1), h= 45 m`
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