first law of motion

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Definition

Noun: - Newton's first law of motion: A fundamental principle of classical mechanics stating that an object will remain at rest or continue to move in a straight line at a constant speed unless acted upon by an external, unbalanced force. This law is also known as the law of inertia.

Usage

This term is used exclusively in the context of physics to describe a foundational concept of motion. - It is a proper noun phrase and is typically capitalized when referred to formally as "Newton's First Law of Motion." - It is used to explain the natural state of objects and the necessity of a force to change that state.

Examples
  • In a textbook:
  • In an explanation:
  • In a discussion:
Advanced Usage
  • "To demonstrate the first law of motion": To perform an experiment or give an example that illustrates the principle of inertia.
    • The teacher used a sliding puck on an air table to demonstrate the first law of motion.
  • "As described by the first law of motion": Used to attribute an observed phenomenon to this specific law.
    • The object's constant velocity, as described by the first law of motion, indicated a net force of zero.
Variants and Related Words
  • Law of inertia: A direct synonym for the first law of motion.
  • Newton's First Law: A common abbreviated form.
  • Inertia: The property of an object, described by the first law, to resist changes in its state of motion.
  • Newtonian mechanics: The branch of physics founded on Newton's laws, including the first law of motion.
Synonyms
  • Law of inertia: The most precise synonym.
  • Newton's first law: A standard abbreviated synonym.
Related Phrases
  • "An object at rest stays at rest...": The beginning of the common phrasing of the law.
  • "Unless acted upon by an unbalanced force": The conditional clause that completes the statement of the law.
Notes

This is a fixed scientific term. It does not have phrasal verbs or idioms in the conventional linguistic sense. Its usage is technical and confined to scientific, educational, and explanatory contexts about physics.

Noun
  1. a body remains at rest or in motion with a constant velocity unless acted upon by an external force

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