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A body starts from rest and moves with u...

A body starts from rest and moves with uniform acceleration. What is the ratio of kinetic energies at the end of `1st , 2nd` and `3rd` seconds of its journey ?

A

`1 : 8 : 27`

B

`1 : 2 : 3`

C

`1 : 4 : 9`

D

`3 : 2 : 1`

Text Solution

Verified by Experts

The correct Answer is:
`(3)`
`KE = 1/2 mv^(2) = 1/2 mg^(2)t^(2) ("because" v = gt)`
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