A rope is used to lower vertically a block of mass $M$ by a distance $x$ with a constant downward acceleration $\frac{g}{2}$. The work done by the rope on the block is
A rope is used to lower vertically a block of mass $M$ by a distance $x$ with a constant downward acceleration $\frac{g}{2}$. The work done by the rope on the block is
- A
$Mgx$
- B
$\frac{1}{2}\,Mg{x^2}$
- C
$-\frac{1}{2}\,Mg{x}$
- D
$Mgx^2$
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