Q1. A satellite is in a circular orbit of radius r. Another satellite is in a circular orbit of radius 4.How do you compare their orbital velocities?
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Pendulum
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This article is about the weight suspended from a pivot. For the band, see Pendulum (Australian band). For other uses, see Pendulum (disambiguation).
A pendulum is a weight suspended from a pivot so that it can swing freely.[1] When a pendulum is displaced sideways from its resting, equilibrium position, it is subject to a restoring force due to gravity that will accelerate it back toward the equilibrium position. When released, the restoring force acting on the pendulum's mass causes it to oscillate about the equilibrium position, swinging back and forth. The time for one complete cycle, a left swing and a right swing, is called the period. The period depends on the length of the pendulum and also to a slight degree on the amplitude, the width of the pendulum's swing.
"Simple gravity pendulum" model assumes no friction or air resistance.
From the first scientific investigations of the pendulum around 1602 by Galileo Galilei, the regular motion of pendulums was used for timekeeping, and was the world's most accurate timekeeping technology until the 1930s.[2] The pendulum clock invented by Christiaan Huygens in 1658 became the world's standard timekeeper, used in homes and offices for 270 years, and achieved accuracy of about one second per year before it was superseded as a time standard by the quartz clock in the 1930s. Pendulums are also used in scientific instruments such as accelerometers and seismometers. Historically they were used as gravimeters to measure the acceleration of gravity in geo-physical surveys, and even as a standard of length. The word "pendulum" is new Latin, from the Latin pendulus, meaning 'hanging'.[3]
Simple gravity pendulum
Period of oscillation
Compound pendulum
History
Use for time measurement
Accuracy of pendulums as timekeepers
Gravity measurement
Standard of length
Other uses
See also
Notes
References
Further reading
External links
Last edited 4 hours ago by Rlink2
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Answer:
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