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# The block of mass 2 kg is initially at rest on a horizontal force $\overrightarrow {F}=(9-x^2) \hat i$ newtons acts on it, when the block is at $x=0$. The maximum kinetic energy of the block between $x=0$ and $x=3m$ in joule is :

$\begin {array} {1 1} (a)\;24 & \quad (b)\;20 \\ (c)\;18 & \quad (d)\;15 \end {array}$

Can you answer this question?

(B) 20
Hence B is the correct answer.
answered Mar 24, 2014 by