15. Rotational Equilibrium
Center of Mass & Simple Balance
Multiple Choice
Multiple ChoiceA 70 kg, 1.90 m man doing push-ups holds himself in place making 20° with the floor. His feet and arms are, respectively, 1.15 m below and 0.4 m above his center of mass. You may model him as a thin, long board, and assume his arms and feet are perpendicular to the floor. How much force does the floor apply to each of his hands? (Use g=10 m/s2.)
A
260 N
B
472 N
C
519 N
D
943 N
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