Solve Prob. 8.88 including the effect of a coefficient of rolling resistance of 0.25 in. Problem 8.88: A 500-lb crate rests on a dolly as shown. The dolly has four 5-in.-diameter wheels with 0.5-in.-diameter axles. Knowing that the coefficients of friction are 0.12 and 0.08, μs= μk= determine the magnitude of the horizontal force P required
(a) For impending motion of the dolly,
(b) To keep the dolly moving at a constant speed. Neglect rolling resistance between the wheels and the floor.