Final answer:
The assertion that static friction is a constant force equal to μs=μσ σσ is false; static friction is a responsive force that can vary up to a maximum value defined by the product of the coefficient of static friction (μσ) and the normal force (σσ).
Step-by-step explanation:
The statement that static friction force μs is a constant force with a value equals to μs=μσ σσ, where μσ is the coefficient of static friction and σσ is the normal force, is false. The magnitude of static friction μs is not constant, but rather varies depending on the circumstances and can adjust up to a maximum value. The correct relationship is expressed as μs ≤ μσ σσ, indicating that the static friction can range from zero up to a maximum value of μσ σσ, where μσ is the coefficient of static friction and σσ is the magnitude of the normal force, which acts perpendicular to the surface in contact and can be equal to the force of gravity.
μσ represents the ratio of the maximum static frictional force to the normal force, and it's a dimensionless quantity characteristic of the contact surfaces. Static friction is a responsive force that increases to be equal and opposite to whatever force is applied, up until its maximum limit. Once the applied force exceeds μs max, the object starts to move, indicating that static friction has been overcome.