A particle is in uniform circular motion if it travels in a circular path at a constant speed. Orbiting satellites, ceiling fans and vinyl records are a few objects that display uniform circular motion. Even though its speed remains constant, a particle in uniform circular motion is constantly accelerating. This can initially be a little counterintuitive, but it stems from the definition that acceleration is the rate of change of velocity which is a vector quantity, having both magnitude and

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... ection. Since the direction of the speed continuously changes when a particle moves in a circular path, the velocity also continuously changes and hence there is a constant acceleration.