In the figure shown,the potential energy $(U)$ of a particle is plotted against its position $x$ from the origin. The particle at:

$A$ rod of mass $m$ and length $l$ is lying on a table. What is the work done to make it stand vertically?

$A$ uniform cable of mass $M$ and length $L$ is placed on a horizontal surface such that its $(1/n)^{th}$ part is hanging below the edge of the surface. To lift the hanging part of the cable up to the surface,the work done should be

$A$ uniform chain of length $2\,m$ is kept on a table such that a length of $60\,cm$ hangs freely from the edge of the table. The total mass of the chain is $4\,kg$. What is the work done in pulling the entire chain onto the table? (Take $g = 10\,m/s^2$) ................ $J$

The following figure shows the variation of potential energy $V(x)$ of a particle with distance $x$. The particle has

$A$ chain of length $L$ and mass $M$ is placed on a frictionless table with one-fifth of its length hanging over the edge. What is the work required to pull the hanging part back onto the table?