a) What is the mechanical advantage of a wheelbarrow, such as the one in Figure 9.22, if the center of gravity of the wheelbarrow and its load has a perpendicular lever arm of 5.50 cm, while the hands have a perpendicular lever arm of 1.02 m?

(b) What upward force should you exert to support the wheelbarrow and its load if their combined mass is 55.0 kg? 

(c) What force does the wheel exert on the ground?

Transcribed Image Text:

F₁1 — 1₁ =₁₂₁² LF₁h lo= rol (a) ·1₁=7₁₁-1 Fo F₁ lo= rol (b) W CG N Free-body diagram Fo CG W N W Free-body diagram F₁ Fth W rh