What is machine? Difference between stress and strain?

Question

Accepted Answer

A machine is a device that uses energy to perform a task. Stress is the force applied to an object, while strain is the deformation caused by stress.

A machine is a mechanical or electrical device that uses energy to perform a task
Stress is the force applied to an object, while strain is the deformation caused by stress
Stress can be measured in units of force per unit area, while strain is measured as a ratio of the change in length or shape to the original length or shape
Examples of machines include engines, pumps, and turbines
Examples of stress include tension, compression, and shear