3. Friction is caused by the _____ on the surfaces in
contact.
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Answer:
Irregularities or roughness
Explanation:
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Answer:
Friction is caused by the interlocking of irregularities in the surface of two objects which are in contact with each other. To move one object over the other ,we have to apply a force to overcome interlocking of the irregularities in their surfaces.
Explanation:
this is the answer
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