centripetal force

Thân thiện

A child swings a bucket of water in a circle, demonstrating centripetal force.

Definition

1. Noun:
   • The inward force on a body moving in a curved path around another body: "Centripetal force" is the force that acts on an object moving in a circular path, directed towards the center around which the object is moving. It is necessary for maintaining circular motion.

Usage

• "Centripetal force" is a technical term used primarily in physics. It describes the net force causing the inward acceleration of an object in circular motion.
• It is not a fundamental force itself (like gravity or electromagnetism) but is the name given to the of other forces that result in circular motion.
• The term is often contrasted with "centrifugal force," which is a perceived outward force in a rotating frame of reference.

Examples

• Noun:
  • The centripetal force required to keep a satellite in orbit is provided by Earth's gravitational pull.
  • When a car turns a corner, friction between the tires and the road provides the centripetal force.
  • In a washing machine's spin cycle, the drum exerts a centripetal force on the clothes, pushing them inward.

Advanced Usage

• "Centripetal acceleration": The acceleration associated with centripetal force, always directed toward the center of the circle. The relationship is given by the formula F = mv²/r, where F is the centripetal force, m is mass, v is velocity, and r is the radius.
  • The centripetal acceleration of the planet increases as it moves closer to the sun.

Variants and Related Words

• Centripetal (adj): Directed or moving toward a center.
  • The centripetal tendency of the political system consolidated power in the capital.
• Centrifugal force (n): The apparent outward force on a body moving in a curved path, observed from within the rotating frame of reference. (Note: This is often discussed in relation to, but is distinct from, centripetal force).

Synonyms

• Inward force: A more general descriptive term.
• Radial force: Force acting along the radius toward the center.

Related Concepts (Not Phrasal Verbs or Idioms)

• Orbital mechanics: The field of study where centripetal force is a fundamental concept.
• Uniform circular motion: Motion in a circle at constant speed, requiring constant centripetal force.

Học thuật

Noun

1. the inward force on a body moving in a curved path around another body