Block A in the figure weighs 65.9N. The coefficient of static friction between the block and the surface on which it rests is 0.27. The weight w is 12.2N and the system is in equilibrium.
block A is placed on a table, it is connected by a string to a wall block w is hung off that string to form a 90degree angle between A and w and a 45degree angle between w and the wall.
A) Find the friction force exerted on block A.
Fr = u Fn
F = ma
The Attempt at a Solution
i tried to find the net force using f = ma but there is no horizonal acceleration... so i am confused. :S help??