Block A of mass 2.2 kg is on block B of mass 5.2 kg as shown in the above figure. The lower block is on a frictionless surface while the coefficient of static friction is 0.3 between the two blocks.
a) If they are moving at constant velocity, what is the frictional force between A and B?
b) What is the maximum horizontal force that can be applied to B without A slipping?
I tried for a) Ff= 0.3*2.2*g = 6.4746N (both positive and negative value) but it was incorrect, and b) I tried 0.3g(2*2.2+5.2) = 28.224 was also incorrect.
2 answers