×
Log in to StudySoup
Get Full Access to University Physics - 13 Edition - Chapter 11 - Problem 55p
Join StudySoup for FREE
Get Full Access to University Physics - 13 Edition - Chapter 11 - Problem 55p

Already have an account? Login here
×
Reset your password

BIO Supporting a Broken Leg. A therapist tells a 74-kg

University Physics | 13th Edition | ISBN: 9780321675460 | Authors: Hugh D. Young, Roger A. Freedman ISBN: 9780321675460 31

Solution for problem 55P Chapter 11

University Physics | 13th Edition

  • Textbook Solutions
  • 2901 Step-by-step solutions solved by professors and subject experts
  • Get 24/7 help from StudySoup virtual teaching assistants
University Physics | 13th Edition | ISBN: 9780321675460 | Authors: Hugh D. Young, Roger A. Freedman

University Physics | 13th Edition

4 5 1 343 Reviews
14
1
Problem 55P

BIO Supporting a Broken Leg. A therapist tells a 74-kg patient with a broken leg that he must have his leg in a cast suspended horizontally. For minimum discomfort, the leg should be supported by a vertical strap attached at the center of mass of the leg–cast system (?Fig. P11.51?). To comply with these instructions, the patient consults a table of typical mass distributions and finds that both upper legs (thighs) together typically account for 21.5% of body weight and the center of mass of each thigh is 18.0 cm from the hip joint. The patient also reads that the two lower legs (including the feet) are 14.0% of body weight, with a center of mass 69.0 cm from the hip joint. The cast has a mass of 5.50 kg, and its center of mass is 78.0 cm from the hip joint. How far from the hip joint should the supporting strap be attached to the cast?

Step-by-Step Solution:

Solution 55P Introduction We have to calculate the center of mass of the leg strap system. Step 1 The mass of one thigh is m = 1 × (74 kg) × 21.5% = 7.95 kg t 2 And the position of center of mass is R cm,t= 18.0 cm The mass of the lower leg is 1 m l 2 × (74 kg) × 14.0% = 5.18 kg And the position of the center of mass is R = 69.0 cm cm,l For the cast, the mass is m c 5.50 kg And the position of the center of mass is R cm,c= 78.0 cm Hence the position of the center of mass of the whole system is mtRcm,tm lcm,lm c cm,c Rcm = m +m +m c t l (7.95 kg)(18.0 cm)+(5.18 kg)(69.0 cm)+(5.50 kg)(78.0 cm) = (7.95 kg)+(5.18 kg)+(5.50 kg) = 49.89 cm Hence the center of mass will be 49.9 cm away from the hip joint.

Step 2 of 1

Chapter 11, Problem 55P is Solved
Textbook: University Physics
Edition: 13
Author: Hugh D. Young, Roger A. Freedman
ISBN: 9780321675460

The full step-by-step solution to problem: 55P from chapter: 11 was answered by , our top Physics solution expert on 05/06/17, 06:07PM. The answer to “BIO Supporting a Broken Leg. A therapist tells a 74-kg patient with a broken leg that he must have his leg in a cast suspended horizontally. For minimum discomfort, the leg should be supported by a vertical strap attached at the center of mass of the leg–cast system (?Fig. P11.51?). To comply with these instructions, the patient consults a table of typical mass distributions and finds that both upper legs (thighs) together typically account for 21.5% of body weight and the center of mass of each thigh is 18.0 cm from the hip joint. The patient also reads that the two lower legs (including the feet) are 14.0% of body weight, with a center of mass 69.0 cm from the hip joint. The cast has a mass of 5.50 kg, and its center of mass is 78.0 cm from the hip joint. How far from the hip joint should the supporting strap be attached to the cast?” is broken down into a number of easy to follow steps, and 157 words. University Physics was written by and is associated to the ISBN: 9780321675460. This full solution covers the following key subjects: mass, leg, hip, Joint, center. This expansive textbook survival guide covers 26 chapters, and 2929 solutions. This textbook survival guide was created for the textbook: University Physics, edition: 13. Since the solution to 55P from 11 chapter was answered, more than 623 students have viewed the full step-by-step answer.

Other solutions

Discover and learn what students are asking

Calculus: Early Transcendental Functions : Hyperbolic Functions
?In Exercises 7-14, verify the identity. \(\tanh ^{2} x+\operatorname{sech}^{2} x=1\)

Calculus: Early Transcendental Functions : Parametric Equations and Calculus
?In Exercises 1-4, find \(d y / d x\). \(x=\sqrt[3]{t}, y=4-t\)




Statistics: Informed Decisions Using Data : Data Collection
?In Problems 1–5, provide a definition using your own words. 3. Sample


Statistics: Informed Decisions Using Data : Applications of the Normal Distribution
?Explain why P(X ? 220) should be reported as > 70.9999 if X is a normal random variable with mean 100 and standard deviation 15.


Statistics: Informed Decisions Using Data : Tests for Independence and the Homogeneity of Proportions
?Health and Happiness Are health and happiness related? The following data represent the level of happiness and level of health for a random sample of



People also purchased

Related chapters

Unlock Textbook Solution

Enter your email below to unlock your verified solution to:

BIO Supporting a Broken Leg. A therapist tells a 74-kg