arks Develop Window Help Sun 8:46 PR chegg.com Ch 09 HW Problem 9.25 10 of 11 Co

Question

arks Develop Window Help Sun 8:46 PR chegg.com Ch 09 HW Problem 9.25 10 of 11 Constants Part A A man doing push-ups pauses in the position shown in (Figure 1). His mass 85 kg Delermine the normal force exerted by the floor on each hand. Express your answer to two significant figures and include the appropriate units. Value Units Submit Request Answer Figure 1 of1 ?PartB Determine the normal force exerted by the floor on each foot Express your answer to two significant figures and include the appropriate units 28 cm ng H72cm 95cm Value Units Request Answer 8

Explanation / Answer

There will be three force on the FBD

Fh and Ff working upward and "mg" downward.

Total Fy = 0

Fh + Ff - mg = 0

mg = 85*9.8

Fh + Ff = 833 N

total torque about center of body = 0

Fh*(0.42) - Ff*0.95 = 0

Fh = Ff*(0.95/0.42)

Fh = 2.262*Ff

Fh + Ff = 833 N

2.262*Ff + Ff = 833 N

Ff = 833/3.262

Ff = 255.36 N

Force on each foot = 255.36/2 = 127.68 N (B)

Fh = 2.262*255.36 = 577.62 N

Force on each hand = 577.62/2 = 288.81 N (A)

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