What do you understand by term friction?Explain how it is caused?
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Friction plays an important part in many everyday processes. For instance, when two objects rub together, friction causes some of the energy of motion to be converted into heat. This is why rubbing two sticks together will eventually produce a fire.
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The force responsible for changing the state of motion of objects in all these examples is the force of friction. Friction is caused by the irregularities on the two surfaces in contact
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