Force

In 1687, Isaac Newton created three laws of motion to describe the relationship between a body and the forces acting upon it, and how the body moves in response to those forces.

In everyday life, the terms mass and weight are interchangeable. However, in physics mass and weight do not mean the same.

The extension of an elastic object, such as a spring, is described by Hooke's law.

Pressure is calculated by dividing force by area. There is more pressure at greater depths in liquids and in denser materials.

Turning forces are found in many everyday situations and are essential for machines to function. Levers and gears make use of these turning forces to provide an advantage.