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A ball released from rest from the roof of a building of height 45 m at t = 0. Find the height of ball from ground at t = 2s.A. 10 mB. 20 mC. 25 mD. 30 m

Answer» Correct Answer - D
Block B will come to rest when velocity of block A = velocity of block C.
`implies underset(0)overset(t)int12tdt=underset(0)overset(t)int3dt`
`6t^(2)=3t`
`t = 0, 0.5`
`therefore " "t = 0.5 sec`


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