law of action and reaction
A student demonstrates the law of action and reaction with two toy cars on a table.
Noun: * Newton's third law of motion: The principle in physics stating that for every action (force) there is an equal and opposite reaction (force). When one object exerts a force on a second object, the second object simultaneously exerts a force equal in magnitude and opposite in direction on the first object.
This term is used almost exclusively in scientific contexts, particularly in physics and engineering, to describe a fundamental law of motion. * It explains the mechanics behind propulsion, collisions, and many everyday phenomena. * It is often cited in its full form, Newton's third law of motion, or simply as the third law.
- The law of action and reaction explains how a rocket propels itself forward by expelling exhaust gases backward.
- When you push against a wall, the wall pushes back on you with an equal force; this is a demonstration of the law of action and reaction.
- According to the law of action and reaction, the force a swimmer applies to the water is matched by the force the water applies to propel the swimmer forward.
- Conceptual Application: The principle is sometimes referenced metaphorically outside of physics to suggest that events or decisions can have direct and opposite consequences.
- In geopolitics, some analysts describe sanctions as an action that often produces a reaction in the form of counter-sanctions.
- Newton's third law (of motion): The most common and precise synonym.
- Third law: A common abbreviated form used in technical discussions.
- Action-reaction principle: A descriptive alternative name.
- Newton's third law
- Action-reaction principle
- For every action, there is an equal and opposite reaction: This is the colloquial, proverbial phrasing of the law, often used even in non-scientific contexts to imply inevitable consequences.
- He spread rumors about his colleague, but for every action, there is an equal and opposite reaction—soon, people began to question his own credibility.
A student demonstrates the law of action and reaction with two toy cars on a table.
- action and reaction are equal and opposite