Chapter U5.14, Problem 1E

Interpretation Introduction

Interpretation: The scientific meaning of the word ‘work’ needs to be explained.

Concept introduction: Machines are all around us doing work for us. They transport us from place to place, helps us to manufacture products, allow us to listen to music, washing our clothes, watch television etc. The source of energy for most of the machines is chemical change.

Answer to Problem 1E

Scientific meaning of work is result of force acting through a distance.

Explanation of Solution

Work is the result of force acting through a distance. A force is a pull or push on an object due to of interaction with another object. Force is measured in newtons, N. Scientists define mechanical work as a product of force and distance. Mathematical expression for work is,

  $\text{Work}\text{=}\text{Force}\times \text{Distance}$

Conclusion

Multiplication of force and distance gives work done on the object.