Deechristophermagic
How do you read a simple pendulum?
What causes a pendulum to swing?
Function. The science behind the pendulum is explained through the forces of gravity and inertia. The Earth's gravity attracts the pendulum. This swinging-back-and-forth force continues until the force that started the movement is not stronger than gravity, and then the pendulum is at rest again. Thereof, why should amplitude of pendulum be small? If it is a pendulum, amplitude must be small because the "time period does not depend on amplitude" rule applies to pendulums only if it is exhibiting simple harmonic motion. So, when amplitude is kept small (allowing use of the sin?=? approximation), time period is independent of amplitude.
What slows down a pendulum?
A pendulum is an object hung from a fixed point that swings back and forth under the action of gravity. The swing continues moving back and forth without any extra outside help until friction (between the air and the swing and between the chains and the attachment points) slows it down and eventually stops it. Then, what is pendulum energy? An ideal pendulum system always contains a stable amount of mechanical energy, that is, the total of kinetic plus potential energy. As the pendulum swings back and forth, the balance between the two types of energy changes constantly. At some points in its swing, the pendulum has more kinetic energy.
Would a pendulum go forever in a vacuum?
If you manage to eliminate all these effects then yes, the pendulum will oscillate forever.
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