Chapter 50, Problem 9TYU

Summary Introduction

To determine: In what way the energy cost per hop differ at the two frequencies and also how this is related to energy storage in tendons.

Concept introduction: The locomotion is one of the most important characteristics of animals. It helps them to find mates, forage and to escape from enemies.

The locomotion on land is mediated in animals by the structural adaptations that evolved over the time to overcome the force of friction and force of gravity that opposed the movement on land. The adaptations for movement include the presence of powerful leg muscles, strong skeletal support and storage of energy in the tendons while hopping (in some animals).

Given data:

The energy consumed when standing is 159 joules/sec.

The energy consumed during hopping at different frequency is given as follows:

Frequency (hops/sec)	Energy used (joules/sec)
1.85	735
0.92	716