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Thus simple harmonic motion is a type of periodic motion. Once the mass is displaced from its equilibrium position, it experiences a net restoring force.

From Wikipedia, the free encyclopedia. Newtonian mechanics Small-angle approximation Rayleigh—Lorentz pendulum Isochronous Uniform circular motion Complex harmonic motion Damping Harmonic oscillator Pendulum mathematics Circle group String vibration.

As long as the system has no energy loss, the analytial continues to oscillate. By using this site, you agree to the Terms of Use and Privacy Policy. Views Read Edit View history.

The area enclosed depends on the amplitude and the maximum momentum. Simple harmonic motion is typified by the motion of a mass on a spring when it is subject to the linear elastic restoring force given by Hooke’s Law.

The other end of the spring is connected to a rigid support such as a wall. This is a good approximation when the angle of the swing is small. A net restoring force then slows it down until solutipns velocity reaches zero, whereupon it is accelerated back to the equilibrium position again.

In other projects Wikimedia Commons. In Newtonian mechanicsfor one-dimensional simple harmonic motion, the equation of motion, which is a second-order linear ordinary differential equation with constant coefficients, can be obtained by means of Newton’s 2nd law and Hooke’s law for a mass on a spring.


When the mass moves closer to the equilibrium position, the restoring force decreases. The motion is sinusoidal in time and demonstrates a single resonant frequency. All articles with unsourced statements Articles with unsourced statements from November A Scotch yoke mechanism can be used to convert between rotational motion and linear cassidya motion. The amalytical motion can take various forms depending on the shape of the slot, but the basic yoke with a constant rotation speed produces a linear motion that is simple harmonic in form.


Retrieved from ” https: The motion of a particle moving along a straight line with an acceleration whose direction is always towards a fixed point on the line and whose magnitude is proportional to the distance from the fixed point is called simple harmonic motion [SHM]. Simple harmonic motion can be considered the one-dimensional projection of uniform circular motion.

The following physical fowels are some examples of simple harmonic oscillator.

By definition, if a mass m is under SHM its acceleration is directly proportional to displacement. Using the techniques of calculusthe velocity and acceleration as a function of time can be found:.

As a result, it accelerates and starts going back to the equilibrium position. The above equation is also valid in the case when an additional constant force is being applied on the mass, i. Simple harmonic motion can serve as a mathematical model for a variety of motions, such as the oscillation of a spring. Other valid formulations are: In the absence of friction and other energy loss, the total mechanical energy has a constant value. The motion solutiohs an undamped pendulum approximates to simple harmonic motion if the angle of oscillation is small.

Simple harmonic motion provides a basis for the characterization of more complicated motions through the techniques of Analytiical analysis. If the system is left at rest at the equilibrium position then there is no net force acting on the mass. However, if the mass is displaced from the equilibrium position, the spring exerts a restoring elastic force that obeys Hooke’s law. These equations demonstrate that the simple harmonic motion is isochronous the period and frequency are independent of the amplitude and the initial phase of the motion.


In the diagram, a simple harmonic oscillatorconsisting of a weight attached to one end of a spring, is shown.

A mass m attached to a spring of spring constant k exhibits simple harmonic motion in closed space. This page was last edited on 29 Decemberat In the small-angle approximationthe motion of a simple pendulum is approximated by simple harmonic motion. The equation for describing the period. In mechanics and physicssimple harmonic motion is a special type of periodic motion or oscillation motion where the restoring force is directly proportional to the displacement and acts in the direction opposite to that of displacement.

Solving the differential equation above produces a solution that is a sinusoidal function.


An undamped spring—mass system undergoes simple harmonic motion. Therefore it can be simply defined as the periodic motion of a body along a straight line, such that the acceleration is directed towards the center of the motion and also proportional to the displacement from that point. Therefore, the mass continues past the equilibrium position, compressing the spring.

For simple harmonic motion to be an accurate model for a pendulum, the solutione force on the object at the end of the pendulum must be proportional to the displacement. In addition, other phenomena can be approximated by simple harmonic motion, including fowlles motion of a simple pendulum as well as molecular vibration. At the equilibrium position, the net restoring force vanishes. Note if the real space and phase space diagram are not co-linear, the phase space motion becomes elliptical.

In the solution, c 1 and c 2 are two constants determined by the initial conditions, and the origin is set to be the equilibrium position.