A body of mass m is kept on a rough horizontal surface of friction coefficient μ μ . A force is applied horizontally, but the body is not moving. The net force 'F' by the surface on the body will be
A
F ≤ ≤ μ μ mg
B
F = μ μ mg
C
mg ≤ ≤ F ≤ ≤ mg 
D
mg ≥ ≥ F ≥ ≥ mg 
Text Solution
Verified by ExpertsThe correct answer is:
C
If the body is not moving, F = f, f is the force of friction on on the body
and 0 ≤ ≤ f ≤ ≤ μ μ mg or 0 ≤ ≤ F ≤ ≤ μ μ mg . . . (i)
The force by the surface on the body
F = 
or F = mg 
∴ ∴ mg ≤ ≤ F ≤ ≤ mg 
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