A rope of length and mass is pulled on a rough horizontal floor by a constant…

PHYSICS · Single correct · CBSE · Physics · Laws of Motion · Laws of Motion

Problem

A rope of length

l

and mass

m

is pulled on a rough horizontal floor by a constant horizontal force

F=mg

. The force acts at one end of the rope along its length. The coefficient of kinetic friction between the rope and floor is

\frac12

. The tension at the midpoint of the rope is: (1)

\frac{mg}{4}

(2)

\frac{2mg}{5}

(3)

\frac{mg}{8}

(4)

\frac{mg}{2}