Physics Flashcards
What does the force of gravity make something fall at?
9.81 m/s2
What is newtons first law?
inertia
an objects tendency to keep doing what it is doing unless acted on by a force
What effects inertia?
increasing mass
What is newtons second law?
Net force is equal to net mass x acceleration
• Fnet = ma
How do you determine force of gravity
fg = mg
What is newton’s third law?
normal force that is perpendicular to whatever force is being applied
When dealing with incline planes what is
a) normal force?
b) gravitational force?
a) mgcosθ
b) mgsinθ
In kinematic equations, what is
a) v?
b) u?
c) s?
d) t?
e) a?
a) final velocity
b) initial velocity
c) displacement
d) time
e) acceleration
Give an equation that lets us work out what the final velocity is without knowing the displacement
v = u + at
Give an equation that lets us work out what the displacement is without knowing the acceleration
s = 1/2 (u + v) t
Give an equation that lets us work out what the final velocity is without knowing the time taken
v2 = u2 + 2as
Give an equation that lets us work out what the displacement is without knowing the final velocity
s = ut + 1/2 at2
When dealing with incline planes what is
a) frictionless acceleration down the incline?
b) acceleration down the incline with friction?
a) gsinθ
b) gsinθ - µcosθ
What is friction force equal to?
friction coefficient x normal force
