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# (a) What force should the woman in Figure 9.45 exert on ISBN: 9780130606204 3

## Solution for problem 37PE Chapter 9

Physics: Principles with Applications | 6th Edition

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Problem 37PE

(a) What force should the woman in Figure 9.45 exert on the floor with each hand to do a push-up? Assume that she moves up at a constant speed. (b) The triceps muscle at the back of her upper arm has an effective lever arm of 1.75 cm, and she exerts force on the floor at a horizontal distance of 20.0 cm from the elbow joint. Calculate the magnitude of the force in each triceps muscle, and compare it to her weight. (c) How much work does she do if her center of mass rises 0.240 m? (d) What is her useful power output if she does 25 pushups in one minute?

Step-by-Step Solution:

Solution 37PE Step-by-step solution Step 1 of 5 (a) Consider the figure shown in 5.48, Draw the free body of diagram as given below, Step 2 of 5 Apply the second condition of equilibrium that is net applied torque around pivot point is zero, Here, is weight of women and is reaction force. Substitute 50.0 kg for , 0.90 m for and 1.50 m for solve for , Force is same on both hands so force on each hand is, Step 3 of 5 (b) Calculate the force in the triceps muscle by equating torque around pivot point, Ratio between forces in the triceps muscle to the weight,

Step 4 of 5

Step 5 of 5

##### ISBN: 9780130606204

Since the solution to 37PE from 9 chapter was answered, more than 740 students have viewed the full step-by-step answer. This textbook survival guide was created for the textbook: Physics: Principles with Applications, edition: 6. The answer to “(a) What force should the woman in Figure 9.45 exert on the floor with each hand to do a push-up? Assume that she moves up at a constant speed. (b) The triceps muscle at the back of her upper arm has an effective lever arm of 1.75 cm, and she exerts force on the floor at a horizontal distance of 20.0 cm from the elbow joint. Calculate the magnitude of the force in each triceps muscle, and compare it to her weight. (c) How much work does she do if her center of mass rises 0.240 m? (d) What is her useful power output if she does 25 pushups in one minute?” is broken down into a number of easy to follow steps, and 112 words. This full solution covers the following key subjects: Force, muscle, triceps, arm, floor. This expansive textbook survival guide covers 35 chapters, and 3914 solutions. The full step-by-step solution to problem: 37PE from chapter: 9 was answered by , our top Physics solution expert on 03/03/17, 03:53PM. Physics: Principles with Applications was written by and is associated to the ISBN: 9780130606204.

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