2. A person with a mass of 85kg, stands on their tip toe one foot and has the following three forces acting on their foot. The tension in the Achilles tendon is 170ON when they are standing on their toes on one foot and the normal reaction force on their toes is 850N. The femur may be treated as a cylinder with length 420mm and a diameter of 32mm. The Young's modulus of the bone in compression is 9GPA. a) What is the change in length of the femur in this position? b) What is the strain energy density of the femur in this case? c) What is the total energy stored in the femur?

2. A person with a mass of 85kg, stands on their tip toe one foot and has the following three forces acting on their foot. The tension in the Achilles tendon is 170ON when they are standing on their toes on one foot and the normal reaction force on their toes is 850N. The femur may be treated as a cylinder with length 420mm and a diameter of 32mm. The Young's modulus of the bone in compression is 9GPA. a) What is the change in length of the femur in this position? b) What is the strain energy density of the femur in this case? c) What is the total energy stored in the femur?

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter14: Static Equilibrium, Elasticity, And Fracture

Section: Chapter Questions

Problem 48PQ: A company is testing a new material made of recycled plastic for use in construction. Figure P14.48...

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