If you tie a string to the end of a block and grab the end of the open string, moving your hand up and down, you will in effect, be creating a harmonic oscillation.
This type of motion is called harmonic motion. This occurs when an object is attached to spring.
It is not an example of a simple harmonic motion. For a simple harmonic motion, the equilibrium point must be in the middle of the applitude. The object must oscillate about equalibrium point.
because we see that in simple harmonic motion there are trignometric function from which we can define its equation of motion. now we know that these function are periodically but bounded to some conditions that's why all periodic function can not be simple harmonic motions.
amplitude
clock pendulum weight on a spring
Period
Simple Harmonic motion is circular motion. Look at a graph showing simple harmonic motion... you'll see it.
what is difference between simple harmonic motion and vibratory motion?
No. "Simple harmonic motion" is motion in a single dimension; it can be represented as the projection of a uniform circular motion.
While a body in motion cannot have zero average velocity, there are many examples where the average velocity - after selected intervals - is zero. For example: a pendulum, or any object under simple harmonic motion, after a complete number of cycles; a rotating object (point on a wheel or hand of a clock) after a whole number of circuits.
When the acceleration is directly proportional to the displacement from a fixed point and always directed towards that fixed point then such an oscillation or vibration is said to be simple harmonic
1) Pathway of a charged particle when it enters a magnetic field... 2) Pendulum oscillations. (simple harmonic motion)