Question

Force of friction is directly proportional to (1)
Area of contact of the surface, (ii) Roughness
of the surface, (iii) Normal force, (iv) Weight.

Please, select the correct answer.

•[i] and [ii] are true
•All are true
•[ii], [iii] and [iv] are true
•[ii] and [iii] are true​

Answer 1

Answer:

all are true

Explanation:

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