College Physics (10th Edition)
10th Edition
ISBN: 9780321902788
Author: Hugh D. Young, Philip W. Adams, Raymond Joseph Chastain
Publisher: PEARSON
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Chapter 10, Problem 59GP
(a)
To determine
The weight
(b)
To determine
The angle
(c)
To determine
Greatest traction force that this apparatus could supply to this patient’s leg and corresponding
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The device shown in the figure below is one version of a Russell traction apparatus. It has two functions: to support the injured leg horizontally and at the same time provide a horizontal traction force on it. This can be done by adjusting the weight W and the angle θ. For this patient, his leg (including his foot) is 90.0 cm long (measured from the hip joint) and has a mass of 11.4 kg. Its center of mass is 41.0 cm from the hip joint. A support strap is attached to the patient's ankle 13.0 cm from the bottom of his foot.
1) What weight W is needed to support the leg horizontally?
Express your answer in newtons.
2) If the therapist specifies that the traction force must be 16.0 N horizontally, what must be the angle θ?
Express your answer in degrees.
3) What is the greatest traction force that this apparatus could supply to this patient's leg?
Express your answer in newtons.
4) What is θ in that case?
Express your answer in degrees.
In exercise physiology studies, it is sometimes important to determine the location of a person’s center of mass. This determination can be done with the arrangement as shown. A light plank rests on two scales, which read Fg1 = 380 N and Fg2 = 320 N. A distance of 1.65 m separates the scales. How far from the woman’s feet is her center of mass?
Find the x - and y -coordinates of the center of gravity for the boomerang in Figure P8.12a. modeling the boomerang as in Figure P8.12b, where each uniform leg of the model has a length of 0.300 m and a mass of0.250 kg. (Note: Treat the legs like thin rods.)
Chapter 10 Solutions
College Physics (10th Edition)
Ch. 10 - When tightening a bolt, mechanics sometimes extend...Ch. 10 - Prob. 2CQCh. 10 - Two identical uniform 30 cm bricks are placed one...Ch. 10 - (a) If the forces on an object balance, do the...Ch. 10 - (a) Can you change the location of your bodys...Ch. 10 - Serious bicyclists say that if you reduce the...Ch. 10 - Prob. 7CQCh. 10 - In terms of torques, discuss the action of a claw...Ch. 10 - Why is a tapered water glass with a narrow base...Ch. 10 - True or false? In picking an axis about which to...
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