(a) Calculate the force (in N) the woman in the figure below exerts to do a push-up at constant speed, taking all data to be known to three digits. (You may need to use torque methods from a laterchapter.)tBAdditional MaterialsReading(b) How much work (in J) does she do if her center of mass rises 0.200 m?JON@2(c) What is her useful power output (in W) if she does 24 push-ups in 1 min? (Should work done lowering her body be included? See the discussion of useful work in Work, Energy, and Power inHumans.)WX0.88 m2,305m = 47 kgCG1.46 m#3 rW80F32$Freaction4E888F4APR4%5 0FS96 1MacBook AirVtvF6.&7 VF711ASDIIFB8 A1(ASK YOUR TEACHER9F9)PRACTICE ANOTHERIF10F11✪=

Mass of girl: mg = 47 kg Distance between feet and force of reaction (F): df = 1.46 m Distance…

(a) Calculate the force (in N) the woman in the figure below exerts to do a push-up at constant speed, taking all data to be known to three digits. (You may need to use torque methods from a later chapter.) N 0.88 m m = 47 kg CG W 1.46 m W F reaction (b) How much work (in J) does she do if her center of mass rises 0.200 m? J (c) What is her useful power output (in W) if she does 24 push-ups in 1 min? (Should work done lowering her body be included? See the discussion of useful work in Work, Energy, and Power in Humans.)

(a) Calculate the force (in N) the woman in the figure below exerts to do a push-up at constant speed, taking all data to be known to three digits. (You may need to use torque methods from a later chapter.) N 0.88 m m = 47 kg CG W 1.46 m W F reaction (b) How much work (in J) does she do if her center of mass rises 0.200 m? J (c) What is her useful power output (in W) if she does 24 push-ups in 1 min? (Should work done lowering her body be included? See the discussion of useful work in Work, Energy, and Power in Humans.)

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter7: Work And Kinetic Energy

Section: Chapter Questions

Problem 84AP: A cart is pulled a distance D on a flat, horizontal surface by a constant farce F that acts at an...

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Concept explainers

Torque

Torque is the rotational equivalent of linear force in physics and mechanics. Based on the course of study, it is also known as the moment of force, rotational force, or turning effect.

Question

100%

(a) Calculate the force (in N) the woman in the figure below exerts to do a push-up at constant speed, taking all data to be known to three digits. (You may need to use torque methods from a later
chapter.)
t
B
Additional Materials
Reading
(b) How much work (in J) does she do if her center of mass rises 0.200 m?
J
O
N
@
2
(c) What is her useful power output (in W) if she does 24 push-ups in 1 min? (Should work done lowering her body be included? See the discussion of useful work in Work, Energy, and Power in
Humans.)
W
X
0.88 m
2,305
m = 47 kg
CG
1.46 m
#
3 r
W
80
F3
2
$
Freaction
4
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F4
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6 1
MacBook Air
V
tv
F6
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7 V
F7
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9
F9
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