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If a ball is thrown vertically upwards w...

If a ball is thrown vertically upwards with a velocity of `40m//s`, then velocity of the ball after `2s` will be `(g = 10m//s^(2))`

A

`10 m//s`

B

`30 m//s`

C

`20 m//s`

D

`40 m//s`

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