Question

select all that apply
which are factors that affect the frictional force between two surfaces that are moving against each other?
□ the speed with which the two surfaces move past each other
□ the materials that make up the surfaces
□ the texture of the surfaces in contact with each other
□ the magnitude of the normal force acting between the two surfaces

Explanation:

• The formula for frictional force \(F_f=\mu F_N\), where \(\mu\) (coefficient of friction) depends on materials and texture of surfaces. \(F_N\) (normal force) also affects frictional force. Speed does not affect frictional force (for kinetic friction, it's approximately constant regardless of speed in simple models).

Answer:

• B. the materials that make up the surfaces
• C. the texture of the surfaces in contact with each other
• D. the magnitude of the normal force acting between the two surfaces