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Question
Tick the most appropriate answer.
Friction for an object can be reduced by
Options
providing wheels
lubricating
streamlining
all of these
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Solution
all of these
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Assertion: Friction always opposes the motion.
Reason: Whenever one surface moves or tries to move over another surface, the force of friction starts acting on the surfaces.
Assertion: We can live very happily if friction is not present in nature.
Reason: The airplane shape is streamlined to reduce the effort of frictional force.
