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A ball is thrown upward from edge of a c...

A ball is thrown upward from edge of a cliff with an intial velocity of 8 m/s. How fast is it moving half second later ?`(g=10 m/s^(2))`

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The correct Answer is:
(i) `3H//4,8H//9,8H//9,15H//16, 1:3,1:8,1:8,1:15`
(ii) 1 : 7
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