A force is applied to pull a wheel over a step. Determine the minimum force necessary if h = 3.0 cm, r = 6.0 cm and the wheel has a mass of 1.4 kg. Use g = 10 N/kg. Hint: Take torques about the corner of the step. It is easier to use the perpendicular form of the torque formula because most of the given lever arm information is given perpendicular to the axis of rotation. To determine the lever arm of the weight of the wheel I set up a 30,60,90 triangle base on h and the radius.

A force is applied to pull a wheel over a step. Determine the minimum force necessary if h = 3.0 cm, r = 6.0 cm and the wheel has a mass of 1.4 kg. Use g = 10 N/kg. Hint: Take torques about the corner of the step. It is easier to use the perpendicular form of the torque formula because most of the given lever arm information is given perpendicular to the axis of rotation. To determine the lever arm of the weight of the wheel I set up a 30,60,90 triangle base on h and the radius.