A man doing push-ups pauses in the position shown in( Figure 1 ) . His mass m =

ID: 1284657 • Letter: A

Question

A man doing push-ups pauses in the position shown in(Figure 1) . His mass m = 78kg .

Part A

Determine the normal force exerted by the floor on each hand.

Express your answer to two significant figures and include the appropriate units.

Part B

Determine the normal force exerted by the floor on each foot.

Express your answer to two significant figures and include the appropriate units.

A man doing push-ups pauses in the position shown in(Figure 1) . His mass m = 78kg . Part A Determine the normal force exerted by the floor on each hand. Express your answer to two significant figures and include the appropriate units. Part B Determine the normal force exerted by the floor on each foot. Express your answer to two significant figures and include the appropriate units.

Explanation / Answer

A. balancing moment about foot point ,

mg x 0.95 - 2 x Fh x (0.42 +0.95) = 0

Fh = 265.03 N

B. balancing moment about hand point :

mg x 0.42 - 2 x Ff x (0.95 +0.42) = 0

Ff = 117.17 N

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A man doing push-ups pauses in the position shown in( Figure 1 ) . His mass m =

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