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Note if the real space and phase space diagram are not co-linear, the phase space motion becomes elliptical.

Analytical Mechanics () :: Homework Help and Answers :: Slader

Views Read Edit View history. 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. 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.

A net restoring force then slows it down until its velocity reaches zero, whereupon it is accelerated back to the equilibrium position again. In the diagram, a simple harmonic oscillatorconsisting of a weight attached to one end of a spring, is shown. An undamped spring—mass system undergoes simple harmonic motion.

Simple harmonic motion

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. Solving the differential equation above produces a solution that is a sinusoidal function. Other valid formulations are: Once the mass is displaced from its equilibrium position, ,echanics experiences a net restoring force.


The area enclosed depends on the amplitude and the maximum momentum. Using the techniques of calculusthe snd and acceleration as a function of time can be found:.


The above equation is also valid in the case when an additional constant force is being applied on the mass, i. 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. Simple harmonic motion provides a basis for the characterization of more complicated motions through the techniques of Fourier analysis.

The motion of a particle moving along a straight line with analttical 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]. Therefore, the mass continues past the equilibrium position, compressing the spring.

In the small-angle approximationthe motion of a simple pendulum is approximated by simple harmonic motion.


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. A mass m attached to a spring of spring constant k exhibits simple harmonic motion in closed space. This page was last edited mehcanics 29 Decemberat At the equilibrium position, the net restoring force vanishes. All articles with unsourced statements Articles with unsourced statements from November This is a good approximation when the angle of the swing is small.

Simple harmonic motion can serve as a mathematical model for a variety of motions, such as the oscillation of a spring. However, if the mass is displaced from the equilibrium position, the spring exerts a restoring elastic force that obeys Hooke’s law.


The linear 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. The other end of the spring is connected to a rigid support such as a wall. For simple harmonic motion to be an accurate model for a pendulum, the net force on the object at the end of the pendulum must be proportional to the displacement. When the mass moves closer to the equilibrium position, the restoring force decreases.

As a result, mmechanics accelerates and starts going back to the equilibrium position. The motion is sinusoidal in time and demonstrates a single resonant frequency. As long as the system has no energy loss, the mass continues to oscillate. In addition, other phenomena can be approximated by simple harmonic motion, including the motion of a simple pendulum as well as molecular vibration.

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

In the absence of friction and other energy loss, the total mechanical energy has a constant value. If the system is left at rest at the equilibrium position then there is no net force acting on the mass.

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