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The kinetic energy of a body of mass 4 k...

The kinetic energy of a body of mass 4 kg and momentum 6 N s will be

A

`3.5` J

B

`5.5 `J

C

`2.5 J `

D

`4.5 J `

Text Solution

Verified by Experts

The correct Answer is:
D
The kinetic energy K and momentum p of a body are related as
`K=(p^(2))/(2m)` where m is the mass of the body. Here ,
p=6 N,s m= 4kg
`thereforeK=((6Ns)^(2))/(2(4kg))=4.5J`
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