A 45 kg boy whose leg bones are 5 cm² in area and 50 cm long falls through a height of 2 m without breaking his leg bones. If the bones can stand a stress of 0.9 x 108 N/ m^2, calculate the Young's modulus for the material of the bone. Use, g = 10 ms 2.

A 45 kg boy whose leg bones are 5 cm² in area and 50 cm long falls through a height of 2 m without breaking his leg bones. If the bones can stand a stress of 0.9 x 108 N/ m^2, calculate the Young's modulus for the material of the bone. Use, g = 10 ms 2.

University Physics Volume 1

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ISBN:9781938168277

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

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

Chapter12: Static Equilibrium And Elasticity

Section: Chapter Questions

Problem 74AP: Two rods, one made of copper and the other of steel, have the same dimensions. If the copper rod...

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Concept explainers

Mechanical Properties of Solids

There are three types of matter- solid, liquid and gas. Out of them, solids have a rigid shaped and size. The intermolecular forces of attractions in solids are greatest. Mechanical properties are the physical properties of a material which it shows, when it is provided with certain amount of force or load. These properties are to be kept in mind for various purposes. When a force is applied to an object, the object may or may not get deformed depending upon its elastic property. But every time the object develops a restoring force against the force applied. This is commonly known as stress. If the object changes its dimensions due to the force applied it develops strain ( which is the ratio of change in dimension to the original dimension).

Question

A 45 kg boy whose leg bones are
5 cm? in area and 50 cm long falls
through a height of 2 m without
breaking his leg bones. If the bones
can stand a stress of 0.9 x 108 N/
m^2, calculate the Young's modulus
for the material of the bone. Use, g =
10 ms 2.

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