A 164-cm-tall person lies on a light (massless) board which is supported by two scales, one under the top of her head and one beneath the bottom of her feet. The two scales read, respectively, 35.1 and 31.6 kg. (Figure 1) Part A What distance is the center of gravity of this person from the bottom of her feet? Express your answer to three significant figures and include the appropriate units. for Part A for Party do for Part redo for Part A reor Part A keyboard shortcuts for Part A help for Part A d-77.7 m Submit Previous Answers Request Answer

I Rev A woman is pushing a load in a wheelbarrow, as in (Figure 1). The combined mass of the wheelbarrow and the load is 140kg, with a center of gravity at d = 0.25m behind the axle. The woman supports the wheelbarrow at the handles, 1.1 m behind the axle. Part A What is the force required to support the wheelbarrow? Express your answer with the appropriate units. HA F = Value Units Submit Previous Answers Request Answer Figure 1 of 1 X Incorrect; Try Again Part B What fraction of the weight of the wheelbarrow and the load does this force represent? ? F w ! You have already submitted this answer. Enter a new answer. No credit lost. Try again. 1.1 m P Pearson

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Part A An 88 kg person stands on a uniform ladder 4.0 m long, that weighs 90 N, as shown in the figure(Figure 1). The floor is rough; hence, it exerts both a normal force, f1, and a frictional force, f2, on the ladder. The wall, on the other hand, is frictionless; it exerts only a normal force, f3. Using the dimensions given in the figure, find the forces exerted on the ladder when the person is halfway up the ladder. Express your answers using two significant figures separated by commas. ? f1, f2, fa = kN Submit Request Answer Part B Find the forces exerted on the ladder when the person is three-fourths of the way up the ladder. Express your answers using two significant figures separated by commas. να ΑΣΦ ? f1, f2, f3 = kN Figure 1 of 1 Submit Request Answer Provide Feedback a-3.8 m mg