Chapter 9, Problem 16A

In what way is a machine subject to the law of energy conservation? Is it possible for a machine to multiply energy or work input?

Solution

To explain: The way a machine is subject to the law of conservation of energy.

To identify: Whether it is possible for a machine to multiply energy or work output.

Introduction:

Energy always gets converted from one form to another form. It cannot be created or destroyed.

Explanation:

In machine, chemical energy is stored in fuel. This chemical energy transformed into mechanical energy. During this transfer, there is loss of energy. This loss is in the form of heat energy. So, chemical energy gets converted into mechanical and heat energy. This way machine subject to the law of conservation of energy.

It is not possible for machine for multiply energy or work input since part of energy gets converted into heat.

Conclusion:

Chemical energy of machine gets converted into mechanical and heat energy and it is not possible for machine to multiply energy.