ap physics quiz 11/18/25

constant velocity means

acceleration is 0

ff (force of friction) =

μkFn

Fx =

ma

how to know if the x and y directions are balanced

if acceleration = 0

gravity is

9.8

if it says constant speed, what do you know

a = 0

friction is there

w (weight) is the same as

Fg (gravity)

what is static friction represented by

𝜇𝑠Fn

how to know if the friction is static or kinetic

static opposes the start of friction and kinetic is when the object is sliding

if there is applied force going up a ramp, to find normal force, what would the equation be?

FN= mgcos(theta) if the force is parallel with the ramp

or

FN = mgcos(theta) + Fsin(a)

where F = applied force and a = angle the applied force is making

kinetic friction equation

𝜇kFN

how to calculate the net force acting on the object

Fnet = ma

to find applied force what's the equation

F = ma

to find acceleration, divide F by M

if there is applied force going up a ramp, what is the equation to find the friction force

Fx = FA  + Wx  + Ff = max

___ - (__)(9.8)sin theta ___ = max

newtons third law

for every action, there is an equal but opposite reaction

how can something be considered interaction/reaction pairs

if two separate objects point in opposite directions but have equal magnitudes

restoring force

any force that works to push or pull an object back to equilibrium

equilibrium point

natural position of the spring with no force acting on it

displacement (Δx)

distance a spring is stretched or compressed

hooke’s law

restoring force is proportional to its displacement from equilibrium

hooke’s law equation

Fs = -kΔx

velocity and acceleration are in the same direction:

speed up

velocity and acceleration in opposite directions:

slows down

CoM equation

m1x1+m2×2 / m1 + m2

percent error

experimental-actual/actual x 100

acceleration equation

a = g(m1-m2/m1+m2)

tension equals what

acceleration

static friction means acceleration is

0

Fnet =

ma

when can there only ever be acceleration

if there are unbalanced net forces

newtons first law

an object at rest must stay in rest and an object in motion must stay in motion unless acted on by an external force which makes the forces unbalanced

newtons second law

when the forces acting on an object like normal force and weight are unbalanced, then the object will accelerate

spring force equation

F_s=-k𝚫x