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1. ### www.khanacademy.org › science › physicsWhat is acceleration? (article) | Khan Academy

Acceleration is the name we give to any process where the velocity changes. Since velocity is a speed and a direction, there are only two ways for you to accelerate: change your speed or change your direction—or change both.

2. ### byjus.com › physics › accelerationWhat Is Acceleration - Formula, Unit, Examples, Types, FAQs

Acceleration is defined as. The rate of change of velocity with respect to time. Acceleration is a vector quantity as it has both magnitude and direction. It is also the second derivative of position with respect to time or it is the first derivative of velocity with respect to time.

3. ### www.britannica.com › science › accelerationAcceleration | Definition, Facts, & Units | Britannica

Jun 27, 2024 · acceleration, rate at which velocity changes with time, in terms of both speed and direction. A point or an object moving in a straight line is accelerated if it speeds up or slows down. Motion on a circle is accelerated even if the speed is constant, because the direction is continually changing.

4. ### www.physicsclassroom.com › Lesson-1 › AccelerationAcceleration - The Physics Classroom

Acceleration is the rate at which they change their velocity. Acceleration is a vector quantity; that is, it has a direction associated with it. The direction of the acceleration depends upon which direction the object is moving and whether it is speeding up or slowing down.

5. ### physics.info › accelerationAcceleration – The Physics Hypertextbook

Any change in the velocity of an object results in an acceleration: increasing speed (what people usually mean when they say acceleration), decreasing speed (also called deceleration or retardation ), or changing direction (called centripetal acceleration ).