Suppose that you can lift no more than 650 N (around 150lb) unaided.
(a) How much can you lift using a 1.4-m-long wheelbarrow that weighs 80.0 N and whose center of gravity is 0.50 m from the center of the wheel (Fig. 11.28)? The center of gravity of the load carried in the wheelbarrow is also 0.50 m from the center of the wheel.
(b) Where does the force come from to enable you to lift more than 650 N using the wheelbarrow?