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Papers > Science > gcse pendulum investigation
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gcse pendulum investigation |
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Pendulums investigation Aim: To investigate how the period of a simple pendulum can change depending on its mass or its length. Research: Pendulum, device consisting of an object suspended from a fixed point that swings back and forth under the influence of gravity. ... In the most basic type of pendulum, the simple pendulum, which oscillates back and forth in a single plane, all the mass of the device can be considered to reside entirely in the suspended object. The motion of pendulums in clocks closely approximates the motion of a simple pendulum. A spherical pendulum, however, is not confined to a single plane, and therefore has a much more complicated motion than that of a simple pendulum. The principle of the pendulum was discovered by Italian physicist and astronomer Galileo, who established that the period for the back-and-forth oscillation of a pendulum of a given length remains the same, no matter how large its arc, or amplitude. (However, if the amplitude is too large, the period of the pendulum is dependent on the amplitude. ... Because of the role played by gravity, however, the period of a pendulum is related to geographical location, because the strength of gravity varies as a function of latitude and elevation. ... Thus, the pendulum can be used to determine accurately the local acceleration of gravity. Compensation pendulum: The simple pendulum, used for timekeeping, is accurate as a regulator, if the proper length of the rod is preserved. ... A refinement was made to ensure uniform length and accurate timekeeping by the use of compensation pendulums, the main types being the mercury pendulum and the gridiron pendulum. The mercury pendulum carries a glass cylinder almost full of mercury. When the pendulum expands downwards because of heat, the change is counterbalanced by the upward expansion of the mercury in the cylinder. |
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Title: gcse pendulum investigation
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