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A ball is dropped from the top of a tower. The ratio of work done by force of gravity in `1^(st), 2^(nd)`, and `3^(rd)` second of the motion of ball is
A. `1:2:3`
B. `1:4:16`
C. `1:3:5`
D. `1:9:5`

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Correct Answer - C
`W = FS rArr(W_(1))/(W_(2)) = (S_(1))/(S_(2)) = ((2n-1)_(1))/((2n-1)_(2))`
`(because S = u+a(n-(1)/(2)))`

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