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

Options

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

Answer

C

Explanation

Force on unit length `=(F)/(L),`
Force on l units of length ` =((F)/(L))l`
Tension at `(L -l)` length `= (F)/(L) (L-l)` .