Laws Of Motion Question 54

Question: What is the maximum value of the force F such that the block shown in the arrangement, does not move [IIT-JEE Screening 2003]

Options:

A) 20 N

B) 10 N

C) 12 N

D) 15 N

Show Answer

Answer:

Correct Answer: A

Solution:

$ f=\mu R $

$ F\cos 60{}^\circ =\mu (W+F\sin 60{}^\circ ) $

Substituting $ \mu =\frac{1}{2\sqrt{3}} $ & $ W=10\sqrt{3} $ we get $ F=20N $



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