Newton's Third Law
For every action there is an equal and opposite reaction.
Also: action-reaction law
Definition
Newton's Third Law of Motion states that for every action force, there is an equal and opposite reaction force. When object A exerts a force on object B, object B simultaneously exerts an equal and opposite force on object A. These paired forces act on different objects and never cancel each other out.
Example
“A rocket launches upward because its engines expel hot gases downward, and the reaction force pushes the rocket in the opposite direction.”
Usage Examples
- 1
“The team applied newton's third law best practices to improve their physics outcomes significantly.”
- 2
“Understanding newton's third law is essential for anyone building a career in STEM.”
When & How to Use
Use 'Newton's Third Law' when working in Physics contexts where newton's third law of motion states that for every action force, there is an equal and opposite reaction force.
- ▸Applying newton's third law principles during a physics project or initiative
- ▸Explaining newton's third law to a junior team member or stakeholder unfamiliar with STEM
- ▸Evaluating options or proposals using newton's third law as a decision-making criterion
Etymology & Origin
The term 'Newton's Third Law' derives from professional usage and entered STEM professional usage as the field formalised in the 20th century.
History & Evolution
The concept of newton's third law has evolved alongside STEM. Early practitioners relied on informal methods; structured approaches emerged with the professionalisation of physics in the mid-20th century. Today, newton's third law is a standard part of STEM practice globally.
Synonyms
- third law of motion
- action-reaction law
- law of reciprocal actions
Images
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Related Terms
- Newton's First Law
- Newton's Second Law
- Momentum
- Thrust