COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
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Chapter 9, Problem 46QAP
To determine
What is the compressive stress on your feet if your weight is spread out evenly over both soles of your shoes? Assume your mass is 55.0 kg and each shoe have an area of 200.0
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The total cross-sectional area of the load-bearing calcified portion of the two forearm bones (radius and ulna) is approximately 2.3 cm2. During a car crash, the forearm is slammed against the dashboard. The arm comes to rest from an initial speed of 80 km/h in 5.1 ms. If the arm has an effective mass of 3.0 kg, what is the compressional stress that the arm withstands during the crash?
Pa
What happens when the stress applied to the
body is increased beyond the maximum value
and is removed after some time?
Select one:
a. The body will not come back to its original
position
O b. The body will come back to its original
position
c. The body will be unaffected.
d. The body will become hot.
e. The body will not feel stress.
EXAMPLE. Assume a leg has 1.2m shaft of bone with an average
cross-sectional area of 3x104m². What is amount of shortening when
all of the body weight of 700 N is supported on this leg.
Chapter 9 Solutions
COLLEGE PHYSICS
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