A person pushing a uniformly?loaded 53.2 kg wheelbarrow of length ???? with pushing force ????? is attempting to get it over a step. The maximum horizontal force that the person can apply is ????????=745 N. What is the maximum height ? of the step, expressed as a fraction ???? of the wheel's radius ???? , that the person can get the wheelbarrow over?
The gravitational acceleration is ????=9.81 m/s2.