Consider again the block that is being pulled in Problem 5. Determine the angle e at which the force that is requires to pull the box is the smallest. What is the magnitude of this force?
I problem 5
A box of mass m = 25 kg is being pulled by a rope. The force that is required to move the box is given by:
F = μmg/cosθ + μsinθ
where μ = 0.55 is the friction coefficient and g = 9.81 m/s2. Determine the angle θ, if the pulling force is 150 N.