Centripetal acceleration is necessary, and is present, whenever any object moves in a closed path, or along any part of a circular path. Some examples I can think of are:
-- a planet or a comet in orbit around the sun -- a moon in orbit around a planet -- the little ball making circles around the spinning roulette wheel -- a stone tied to the end of a string, when you spin it around your head -- the end of the spinning string on a weed-whacker -- the tip of the blade of a fan or a windmill -- any little bit of rubber on a car tire or bicycle tire, when they're moving -- a strawberry seed spinning around the inside of the blender jar when you're making a smoothie -- a car driving around a curve in the road -- you on almost any amusement park ride; whenever you're not moving in a straight line, you're experiencing centripetal acceleration.
centripedal acceleration :
⇒ the moon in orbit around a planet (or the sun). ⇒ The Earth (or an other planet) in orbit around the sun.
Centripetal acceleration occurs when an object moves in a circular path, directed towards the center. Examples include planets in orbit, moons orbiting planets, cars turning on curved roads, and spinning amusement park rides. It is always associated with a force that acts towards the center of the circle maintaining the motion.
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