A mechanism with four links is known as a simple mechanism, and a mechanism with more than four links is known as a compound mechanism.When one of the links of a kinematic chain is fixed, the chain is known as a mechanism.It is given by the formula, \(a_c = × 0.032\).Because velocity is a vector quantity (that is, it has both a magnitude, speed, and direction), when a body travels on a circular path, its direction constantly changes, and thus its velocity changes, producing acceleration.Centripetal acceleration is the acceleration of a body traversing a circular path.Since the direction of the velocity vector is the same as the direction of the object's motion, the velocity vector is directed tangent to the circle as well. At all instances, the object is moving tangent to the circle.As an object moves in a circle, it is constantly changing its direction. Uniform circular motion can be described as the motion of an object in a circle at a constant speed.
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