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Grade: 11


There is a friction between 2m and surface ,find the value of coefficient of friction,so that system remains in equilibrium.

5 months ago

Answers : (1)

120 Points
The mass m is in equilibrium so the value of tension will be mg.
In mass 2m six forces are acting
1. T = mg at bottom in horizontal direction
2. Its weight in downward direction 2mg
3. Normal reaction from the surface in upward direction N
4. The upper pulley attached applies force of tension T in horizontal direction away from the mass and a force equal to T in downward direction.
Balance the  vertical forces ,
N = T +2mg = 3mg
5. The frictional force equal to uN = u3mg
  Balance the horizontal force ,
T+T= friction
mg +mg = 3mgu
u = 2/3
Hope you understood.
5 months ago
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