a ball thrown up vertically returns after 6 seconds find velocity by which it was thrown and find the maximum height it reached
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since t=2u/g
therefore u=6*10/2=30m/s
and h=u²/2g
=30*30/2*10=900/20=45m
therefore u=6*10/2=30m/s
and h=u²/2g
=30*30/2*10=900/20=45m
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