based on motion under gravity

Asked by  | 3rd Dec, 2008, 03:34: PM

Expert Answer:

Let the height of tower be h.

We have:

h=1/2gt2

and h-20=1/2g(t-1)2

solving:

20=1/2g(2t-1)

hence ,t=20/g+ 1

and h=1/2g(20/g+1)2

 

Answered by  | 4th Dec, 2008, 12:10: PM

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