Physical P1 Formulas Flashcards
(19 cards)
What is the formula for maximum static friction force?
Ffₘₐₓ = μₛ × Fₙ
What does Ffₘₐₓ represent?
Ffₘₐₓ is the maximum static friction force before an object starts moving.
What is μₛ?
μₛ is the coefficient of static friction.
What is Fₙ?
Fₙ is the normal force.
When is the maximum static friction force used?
Used when the object isn’t moving yet, but a force is trying to push/pull it.
What is the formula for kinetic friction?
Fₖ = μₖ × Fₙ
What does Fₖ represent?
Fₖ is the kinetic friction (while the object is sliding).
What is μₖ?
μₖ is the coefficient of kinetic friction.
When is kinetic friction used?
Used when the object is already moving.
What is the formula for normal force on a flat surface?
Fₙ = Fg
(Fg = m × g)
What happens to normal force when a force is applied upward?
Fₙ = Fg – Fy
What happens to normal force when a force is applied downward?
Fₙ = Fg + Fy
What is the formula for normal force on a slope?
Fₙ = Fg⊥ = m × g × cos(θ)
What is the formula for gravitational force?
Fg = m × g
What does g represent in the gravitational force formula?
g = 9.8 m/s² (gravitational acceleration)
What is the formula for gravitational force component along a slope?
Fg‖ = m × g × sin(θ)
Used for motion along the slope (horizontal-ish)
What is the formula for gravitational force component perpendicular to a slope?
Fg⊥ = m × g × cos(θ)
Used for calculating Fₙ (vertical-ish)
How do you calculate the coefficient of friction?
μ = Ff / Fₙ
Can the coefficient of friction be used for both static and kinetic friction?
Yes, it can be used for both static or kinetic friction.
