The cart together with the load weighs 150 lb and has a center of gravity at G. If the whe...

The cart together with the load weighs 150 lb and has a center of gravity at G. If the wheels fit loosely on the 1.5-in. diameter axles, determine the horizontal force P required to pull the cart with constant velocity. The coefficient of kinetic friction between the axles and the wheels is μk  = 0.2. Neglect rolling resistance of the wheels on the ground.