First slide

Work done by Diff type of forces

Question

In Figure, a block is pulled by a constant horizontal force on a smooth surface. Work done on the block as a function of speed acquired by the block can be described by :

Easy

A
B
C
D

Solution

From work energy theorem $W = Fd = 1 / 2 {mv}^{2} \Rightarrow W \propto v^{2}$

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