There are two blocks against a wall on a frictionless table. I can't really manage a diagram, so please imagine this. There are two blocks, one of 5 kg and another of 10 kg, against each other. The 10 kg one is touching the wall.
The frictional coefficient between the two blocks is 0.2
A force of 200 N is applied to the 5 kg block. What is the reactional force?
Newton's laws and Frictional force = frictional coef. x Normal
The Attempt at a Solution
Should it not be 200 N back? ( The ans. is 177) What role does the friction play here?