Consider two bodies of weight W_{1} and W_{2} respectively connected by a light inextensible string as shown in fig,

Let the body W_{1} hang free and the W_{2} be places on an inclined rough plane. W_{1} will move downwards and the body W_{2} will move upwards along the inclined surface.

Consider the motion of W_{1} W_{1} – T = (W_{1}/g)a ...(1)

Consider the motion of W_{1}T – W_{2}sin α – µW_{1}cos α = (W_{1}/g)a ...(2)

Solve the equations for ‘T’ and ‘a’