Answer
127N
Work Step by Step
To find Ff,max, we need to find the Normal force acting on the crate from the floor. To do this we find all the forces in the vertical direction, which are the weight of the crate and the normal force. Since the crate does not accelerate in the y direction, the two forces balance and so the N = mg = 35kg *9.8 = 343N. Then we are told that the coefficient is 0.37 and so Ff,max = 343N*0.37 = 127N
