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Results tagged with energy-conservation
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user 148132
The law of conservation of energy, which states that the amount of energy in a system is constant. For questions about Earth's environment, see the climate-science tag instead.
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friction in pulley [closed]
Suppose there is a a pulley with which two masses are attached.Assume the strings to be light and inextensible.If friction is present between string and the pulley ie the pulley is not smooth then w …
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answer
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Swinging of a bob [closed]
Suppose a variable force is acting on the bob and making it swing as shown in the figure then why will kinetic energy be conserved here even though there is a variable force acting on the bob?