1.

Assertion: when the surface are pressured harder, friction increases.Reason: the friction is caused by the interlocking irregularities in the two surface.​

Answer»

Answer:

WHEN TWO BODIES RUB WITH EACH OTHER FRICTION INCREASE.

Explanation:

THERE ARE SMALL PITS AND BUMPS ON EVERY SUBSTANCE.WHEN TEO BODIES COLLIDE OR RUB, THE PITS AND BUMP GET LOCKED WHICH CAUSES INCREASE IN FRICTION.



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