Wheelbarrows are designed so that a person can move a massive object more easily than if...

Wheelbarrows are designed so that a person can move a massive object more easily than if he simply picked it up. If the person using the wheelbarrow in Figure P8.37 is able to apply a total vertical (upward) force of 200 N on the handle, what is the approximate mass of the heaviest object he could move with the wheelbarrow?