Question

Find the Work done in the rope for the following.A box is pulled a distance of 12 meters along horizontal ground by the tension of magnitude 50N in a light, inextensible rope which is held parallel to the ground

Answer 1

Work (W) done by a force(F) is given by

`\begin{gathered} W=\text{ F.S}\cos\theta\text{ ;}\begin{cases}S={displacement=\text{ 12m}} \\ F={force=\text{ 50N}}\end{cases} \\ \\ \therefore\text{ W= 50}*12*1\begin{cases}\theta={angle\text{ between F and S= 0}} \\ cos0\degree={1}\end{cases} \\ \therefore W=\text{ 600 Joule;} \end{gathered}`

Final answer is 600 Joule