Let us cosider the force exerted on a mass by a spring attached to it.
This force take the form F = - k X
Where X measures the displacement of the mass from an equilibrium position;
k is a constant characteristic of the particular spring known as spring constant.
This force law is known as Hooke's law.
This Java applet let you familar with this kind of relation and simple harmonic motion。
How to play:
There is a spring on the table, a string is connected to the spring over a light frictionless pulley.
You can attach mass/blocks to the spring :
The spring will relax to its equilibrium position.
You can detach mass/blocks from the spring
Press the mouse button to suspend the animation, click it again to resume.
Press Stop button to reset the spring back to equilibrium position.
Press Reset button to reset parameters to default values.
If a spring with a mass attached to it is slightly stretched or compressed and then let loose,
it will oscillate in a way close resembling (simple harmonic motion SHM).
Many elastic systems (building, flagpoles, airplane wings, etc) behave in a very similar fashion.
Your suggestions are highly appreciated! Please click email@example.com
Author：Fu-Kwun Hwang, (Click for more than 40 physics related java applets)
Dept. of physics, National Taiwan Normal University
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