Friction force

# Friction force - Friction force A block of mass m projected...

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Friction force A block of mass m projected onto a rough surface will be brought to rest by the kinetic friction force. There is no way to get back the original kinetic energy of the block after the friction force has brought it to rest. The directed long-scale motion of the block has been transformed into kinetic energy of the randomly directed moving atoms that make up the block and the plane. We can not associate a potential energy with the friction force. 8.3. Conservative and non-conservative forces If a potential energy can be associated with a force, we call the force conservative . Examples of conservative forces are the spring force and the gravitational force. If a potential energy can not be associated with a force, we call that force non-conservative . An example is the friction force. Alternative tests of the conservative nature of a force are: 1. A force is conservative if the work it does on a particle that moves through a round trip is zero; otherwise, the force is non conservative. The requirement of zero work for a round trip is not met

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Friction force - Friction force A block of mass m projected...

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