Kinematics ! 40 POINTS
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initial velocity , u = 0
height of the tower = h
height of balcony = h - 20
when stone is dropped from the tower suppose the time taken is t , then for the second case it will be t - 1
h = ut + 1/2 gt raise to 2 = 0+ 1 /2 gt raise to 2 .........................(1)
h - 20 = 1/2 g ( t -1) raise to 2 ................(ii)
solving (1) and (ii)
we get t = 2.5
h = 31 . 25
hope it helps
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