Question

Friction depends on the _______ of substance in contact.

Answer 1

Answer:

smoothnessFriction depends partly on the smoothness of the contacting surfaces, a greater force being needed to move two surfaces past one another if they are rough than if they are smooth.

Answer 2

Answer:

Mass

Explanation:

Frictional force f=μmg

Here μ is the coefficient of friction

m is mass and

g acceleration due to gravitation