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A ball is dropped from the top of a towe...

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`

Text Solution

Verified by Experts

The correct Answer is:
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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