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- Simple harmonic motion
- Equation of SHM|Velocity and acceleration|Simple Harmonic Motion(SHM)
- Simple harmonic motion

Simple harmonic motion SHM is a special case of motion in a straight line which occurs in several examples in nature. This is an example of a second order differential equation. We can easily check this:. We write the differential equation as. Hence, we have.

Simple harmonic motion , in physics , repetitive movement back and forth through an equilibrium , or central, position, so that the maximum displacement on one side of this position is equal to the maximum displacement on the other side. The time interval of each complete vibration is the same. The force responsible for the motion is always directed toward the equilibrium position and is directly proportional to the distance from it. A specific example of a simple harmonic oscillator is the vibration of a mass attached to a vertical spring , the other end of which is fixed in a ceiling. At either position of maximum displacement, the force is greatest and is directed toward the equilibrium position, the velocity v of the mass is zero, its acceleration is at a maximum, and the mass changes direction. At the equilibrium position, the velocity is at its maximum and the acceleration a has fallen to zero.

In mechanics and physics , simple harmonic motion is a special type of periodic motion where the restoring force on the moving object is directly proportional to the object's displacement magnitude and acts towards the object's equilibrium position. It results in an oscillation which, if uninhibited by friction or any other dissipation of energy , continues indefinitely. Simple harmonic motion can serve as a mathematical model for a variety of motions, but is typified by the oscillation of a mass on a spring when it is subject to the linear elastic restoring force given by Hooke's law. The motion is sinusoidal in time and demonstrates a single resonant frequency. Other phenomena can be modeled by simple harmonic motion, including the motion of a simple pendulum , although for it to be an accurate model, the net force on the object at the end of the pendulum must be proportional to the displacement and even so, it is only a good approximation when the angle of the swing is small; see small-angle approximation. Simple harmonic motion can also be used to model molecular vibration as well. Simple harmonic motion provides a basis for the characterization of more complicated periodic motion through the techniques of Fourier analysis.

We saw in the chapter introduction that second-order linear differential equations are used to model many situations in physics and engineering. In this section, we look at how this works for systems of an object with mass attached to a vertical spring and an electric circuit containing a resistor, an inductor, and a capacitor connected in series. Models such as these can be used to approximate other more complicated situations; for example, bonds between atoms or molecules are often modeled as springs that vibrate, as described by these same differential equations. Consider a mass suspended from a spring attached to a rigid support. This is commonly called a spring-mass system.

Thanks for visiting our website. Our aim is to help students learn subjects like physics, maths and science for students in school , college and those preparing for competitive exams. All right reserved. All material given in this website is a property of physicscatalyst. Convinently we choose equation 3c i. Fig below shows the displacement vs.

*Особенно таких, как Хейл, - зеленых и наивных.*

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