a. What force in newtons should the woman in the figure exert on the floor with each hand to do a push-up? Assume that she moves up at a constant speed. _______ N b. The triceps muscle at the back of her upper arm has an effective lever arm of 1.76 cm, and she exerts force on the floor at a horizontal distance of 18.0 cm from the elbow joint. Calculate the magnitude of the force in newtons in each triceps muscle. _________ N Compare the magnitude of the total force exerted by both triceps muscles to her weight. total force exerted by both triceps muscles/her weight = c. How much work does she do in joules if her center of mass rises 0.255 m? _______ J
a. What force in newtons should the woman in the figure exert on the floor with each hand to do a push-up? Assume that she moves up at a constant speed. _______ N b. The triceps muscle at the back of her upper arm has an effective lever arm of 1.76 cm, and she exerts force on the floor at a horizontal distance of 18.0 cm from the elbow joint. Calculate the magnitude of the force in newtons in each triceps muscle. _________ N Compare the magnitude of the total force exerted by both triceps muscles to her weight. total force exerted by both triceps muscles/her weight = c. How much work does she do in joules if her center of mass rises 0.255 m? _______ J
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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Question
Consider the following figure.
a.
What force in newtons should the woman in the figure exert on the floor with each hand to do a push-up? Assume that she moves up at a constant speed.
_______ N
b.
The triceps muscle at the back of her upper arm has an effective lever arm of 1.76 cm, and she exerts force on the floor at a horizontal distance of 18.0 cm from the elbow joint. Calculate the magnitude of the force in newtons in each triceps muscle.
_________ N
Compare the magnitude of the total force exerted by both triceps muscles to her weight.
total force exerted by both triceps muscles/her weight =
c. How much work does she do in joules if her center of mass rises 0.255 m?
_______ J
d.
What is her useful power output in watts if she does 21 push-ups in one minute?
_______ W
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