LAWS OF MOTION

referring to the three laws of motion and interaction formulated by Sir Isaac Newton (1642–1727), English scientist and mathematician. These laws are intended to describe how all moving bodies on the Earth react: (1) a body at rest remains at rest and a body in motion remains in motion unless acted on by an external force; (2) the motion of a body changes in proportion to the size of the force applied to it; (3) every action produces an equal but opposite reaction. —5th ACC Vol 2 Glossary (Final Approval 7/12/89), 5th ACC Glossary Part 1. Final approval 2.12.89