The physical parameters in a simple pendulum experiment are a small-diameter bob and a string that has negligible mass, according to OpenStax College. The string should not be elastic, however. More » Science Physics Motion & Mechanics

Technically, a pendulum can be created with an object of any weight or shape attached to the end of a rod or string. However, a spherical object is preferred because it can be most easily assumed that the center of mass ... More » Math Geometry Shapes

Once a pendulum is moved, simple gravity is what keeps it swinging. Sometimes additional means are used such as weights, pulleys and springs. More » Science Physics Motion & Mechanics
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