Question

Friction is a -
1)Non contact force
2)contact force
3) magnetic force
4) None of these .
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Answer 1

Answer:

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Explanation:

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Answer 2

Answer:

Friction is a force between two surfaces that are sliding, or trying to slide, across each other. ... Friction always works in the direction opposite to the direction in which the object is moving, or trying to move. Friction always slows a moving object down.