Question

A wooden stick 2m long is floating on the surface of water. The surface tension of water 0.07 N/m. By putting soap solution on one side of the sticks the surface tension is reduced to 0.06 N/m. The net force on the stick will be

Answer 1

Correct Answer - d
Force on one side of the stick `F_(1)=T_(1)xxL " "=0.07xx2=0.14 N`
and force on other side of the stick `F_(2)=T_(2)xxL=0.06xx2=0.12N`
So net force on the stick `F_(1)-F_(2)=0.14-0.12=0.02N`