Question

A rope of length 10 m and linear density 0.5 kg/m is lying lengthwise on a smooth horizontal floor. It is pulled by a force of 25 N. The tenison in the rope at a point 6 m away from the point of application is :-

• A. 20 N
• B. 15 N
• C. 10 N
• D. 5 N

Answer 1

The correct option is C 10 N

$\begin{array}{c}\text{acceleration of whole}\\ \text{rope}\\ \begin{array}{c}ma=25\\ \text{on}0.5\times 10\times a=25\\ \text{on}a=5.m/s^2\\ \text{Tenstion}6m\text{away will}\\ T=(10-6)\times 0.5\times a\\ \text{On}T=2\times 5N\\ \text{on}T=10N\end{array}\end{array}$

Option C