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A block of mass 4 kg is initially at res...

A block of mass `4 kg` is initially at rest on a horizontal frictionless surface. A force `vec(F) = (2x+3x^(2))hat(i) N` acts horizontally on it. The maximum kinetic energy of the block between `x = 2m` and `x=4m` in joules is

A

`40`

B

`36`

C

`68`

D

`52`

Text Solution

Verified by Experts

The correct Answer is:
C
`K.E = W = underset(x_(i))overset(x_(f))intf(x)dx`
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