center of gravity
Học thuậtThân thiện
Definition
- Noun:
- The point within an object where its weight is considered to be concentrated and through which the force of gravity acts: It is the average location of an object's weight distribution. For objects in a uniform gravitational field, this point is identical to the center of mass.
Usage
- The term is used primarily in physics, engineering, and mechanics to analyze balance, stability, and motion.
- It describes a single, specific point that is crucial for calculations involving equilibrium, rotation, and the effects of gravity on a body.
Examples
- Noun:
- A low center of gravity makes a vehicle more stable and less likely to tip over.
- The gymnast lowered her center of gravity to maintain balance on the beam.
- In aircraft design, engineers must calculate the center of gravity precisely.
Advanced Usage
- "To shift one's center of gravity": To change one's posture or stance, thereby altering the point where weight is balanced.
- The martial artist shifted his center of gravity forward to deliver a more powerful punch.
- Used metaphorically to describe a focal point or central element of a system or concept.
- The center of gravity of the political debate has moved toward economic issues.
Variants and Related Words
- Center of mass (noun): The mean location of all mass in a system. For practical purposes on Earth, it is often synonymous with center of gravity.
- Centroid (noun): The geometric center of a plane figure or solid, often coinciding with the center of mass for objects of uniform density.
Synonyms
- Balance point
- Center of mass (in uniform gravity)
Notes
- The center of gravity is a fundamental concept for understanding stability. An object is stable if its center of gravity is above its base of support.
- For complex or non-uniform objects, the center of gravity may not be located at the physical center of the object.
Noun
- the point within something at which gravity can be considered to act; in uniform gravity it is equal to the center of mass