newton's second law
Definition
Noun: - A fundamental law of motion in classical mechanics: Newton's second law states that the acceleration of an object is directly proportional to the net force acting upon it and inversely proportional to its mass. The direction of the acceleration is in the direction of the net force.
Usage
This term is used exclusively in the context of physics to describe one of the three laws formulated by Sir Isaac Newton that govern motion. - It is typically introduced in educational settings when studying mechanics. - It is a core principle for calculating the motion of objects when forces are applied.
Examples
- In a textbook:
- In an explanation:
- In a discussion:
Advanced Usage
- "To apply Newton's second law": To use the principle F=ma to solve a physics problem involving forces and motion.
- To find the tension in the rope, we must first apply Newton's second law to each block.
- Conceptual discussions may refer to it as "the law of acceleration".
Variants and Related Words
- Newton's laws of motion: The collective term for Newton's first, second, and third laws.
- Second law of motion: A common shortened form.
- F=ma: The iconic mathematical formula representing the law.
Synonyms
- Law of acceleration (This is a descriptive synonym, not a formal replacement).
- Fundamental principle of dynamics.
Related Phrases
- Net force: The vector sum of all forces acting on an object, a key component in applying the second law.
- Rate of change of momentum: An alternative, more general formulation of the law (Force = rate of change of momentum).
Noun
-
the rate of change of momentum is proportional to the imposed force and goes in the direction of the force
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