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In the figure shown coeff of static friction b/w c and ground is0.5,coeff of static friction b/w a and b is0.25 , b/w b and c is zero. Find the minimum value of force F to cause sliding b/w a and b. Masses of a,b,c are 2kg, 4kg, 5kg.

Monali Patra , 6 Years ago
Grade
anser 1 Answers
Saurav

Last Activity: 6 Years ago

5N
As there is no friction between b and c b can't apply any horizontal force on c and vice versa therefore u can replace c by a frictionless ground 
Now normal N on b due to a is 2g 
Maximum friction needed is kN 
That is 5newton

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