Advantages And Disadvantages Of Harmonic Motion

Introduction
It is an undeniable fact that resonance is a common physics phenomenon in our daily life, but it is a double-edged sword, sometime it is useful, moreover, it can be extremely harmful. In the following essay, I intend to introduce the simple harmonic motion includes damping and resonance, and this essay will also introduce some information about the advantage and disadvantage of resonance.

Content page
1.Simple harmonic motion 1.1 Mass-spring system 1.2 Simple pendulum 1.3 Simple harmonic motion of damping 1.4 Resonance
2.The advantage and disadvantage of resonance 2.1 Application of resonance 2.2 Disadvantage of resonance

1.Simple Harmonic Motion
Simple harmonic motion (SHM) is a special type of motion, which has a force affected objects doing an oscillatory motion or period motion, such as mass-spring system

That is another motion which called damped harmonic motion. The definition of damping is the amplitude will decrease by resistance of air and to internal friction within the oscillating system. Figure.5 shows the time-displacement diagrams of damped harmonic motion. Fig.5
Whatever spring or pendulum, the energy will lost when the object are against resistant, the amplitude decreasing and finally equal to zero. There are three different types of damped harmonic motion, underdamped, overdamped and critical damping. In underdamped situation, the object move several period and then come to rest, which shows in fig.6. For overdamped, it means this motion is not a period motion, the object move start at equilibrium position, and reach equilibrium slowly, which shows in fig.7. The last situation is shown in fig.8, it is critical damping, it similar to overdamped, but in this case object become rest in shorter