Question

multiple choice question
if more force pushes two surfaces together, then the friction between the surfaces will
o stay the same
decrease
o increase

Explanation:

Friction force \(F_f=\mu F_N\), where \(\mu\) is the coefficient of friction (depends on the nature of the surfaces) and \(F_N\) is the normal force (the force pushing the two surfaces together). If \(F_N\) increases (more force pushing the surfaces together) and \(\mu\) remains constant (assuming the surfaces don't change), then \(F_f\) will increase.

Answer:

increase