The kinetic energy of a body of mass 2 k...

The kinetic energy of a body of mass 2 kg and momentum of 2 Ns is

A

1J

B

3J

C

2J

D

4J

Verified by Experts

The correct Answer is:

A

Velocity of the body after 3 s is given by
`v=u+ at =0 +"gt "=9.8 xx 3=29.4m//s`
`therefore K.E.=1/2 mv^(2)=1/2 xx 3 xx (29.4)^(2)=1296J`

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