One complete oscillation is called a cycle, and the time required to complete one cycle is called a period. The proportionality constant is the spring constant. As a result, the force is proportional to the displacement but in the opposite direction. ![]() Here, the acceleration is directed toward the center of oscillation and is proportional to the displacement from the equilibrium position. When this system is pulled up and released, it vibrates. ![]() However, not all periodic oscillations are simple harmonic motions.Ĭonsider a ruler with one end fixed to the tabletop and the other free with a mass attached. If the restoring force on the object is proportional to the displacement from the equilibrium position, the oscillation is called simple harmonic motion. Periodic motion in which an object moves to and fro from a fixed point is called oscillation. If moving objects repeat their path over a regular interval, it is called harmonic or periodic motion.
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