The 61-lb force P is applied to the 170-lb crate, which is stationary before the force is applied. Determine the magnitude and direction of the friction force F exerted by the horizontal surface on the crate. The friction force is positive if to the right, negative if to the left. Assume us = 0.43, HK = 0.32. Answer: F = i Ib Save for Later Attempts: 0 of 1 used Submit