Question

"Friction is independent of weight, but depends on normal force between sur.
faces of contact where friction existe". Do you agree with this statements
Discuss.
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Answer 1

Explanation:

In kinetic friction, when object is moving, NORMAL FORCE would be less , which makes it less than static friction. So is the case of rolling , sliding friction. Adding more mass also increases normal force. Hence, FRICTION depends on normal force between surfaces of contact where friction exists .