The blocks A and B each have a mass m. What is the largest horizontal force which must be applied to B so that A will not slip up B if the coefficient of static friction between A and B is m. Neglect friction between B and C. a.
2 m g (m
cos q
+ sin q)/(cos
q + m sin q)


Consider the forces
acting on the blocks. The net horizontal
force acting on B is The largest horizontal
force that must be applied to B so that A will not slip up B is
