Question
A body of mass M is kept on a rough horizontal surface (friction coefficient = μ). A person is trying to pull the body by applying a horizontal force but the body is not moving. The force by the surface on the body is F, whereÂ
Answer: Option C
:
C
If F1 = 0
So contact force will only have Normal which is equal to Mg
So F will be Mg
Now as F1 increasesfrkeeps increasing till it reaches limiting value i.e., μN = μmg
So, in that case, contact force F will be
√N2+fr2 =√(Mg)2+(μMg)2
F = Mg√1+μ2
This means contact force F will lie between Mg≤ F≤ Mg√1+μ2
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:
C
If F1 = 0
So contact force will only have Normal which is equal to Mg
So F will be Mg
Now as F1 increasesfrkeeps increasing till it reaches limiting value i.e., μN = μmg
So, in that case, contact force F will be
√N2+fr2 =√(Mg)2+(μMg)2
F = Mg√1+μ2
This means contact force F will lie between Mg≤ F≤ Mg√1+μ2
Was this answer helpful ?
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