00:01
In this problem, we have two masses, m1 of 30 kg, m2 of 20 kg.
00:10
The two masses are connected with the help of a massless string passing over a frictionless pulley.
00:16
The mass m1 is placed on a rough inclined plane with angle of inclination 35 degrees.
00:24
The system is such that m2 move downward with constant velocity v.
00:29
Then m1 will also move upward with constant velocity v.
00:33
We have to find out the magnitude of friction force.
00:37
For this, let us draw the forces.
00:38
On m2, the weight m2g act in the vertically downward direction.
00:43
The tension t act in the upward direction.
00:46
The same amount of tension pulls m1 in upward direction...