*multiple paths/ more pipes/two finger rule
*voltage is equal
*current adds up
Front
resistors in parallel
Back
*conserve momentum and kinetic energy
*magnetic bumpers with carts
Front
Elastic collisions
Back
v=x/t velocity
Front
slope of a position vs time graph
Back
Ft= impulse= change of momentum
Front
area of a force vs time graph
Back
F = force (equal and opposite on masses)
G=6.67x10^-11
m = mass (kg)
r = distance center to center (m)
Force = mg or ma or mv^2/r
Front
universal law of gravitation
Back
Fx=work= change of kinetic energy
Front
area of a force vs displacement graph
Back
a= change of v/time acceleration
Front
slope of a velocity vs time graph
Back
*depends on planet/ location
*period is time for one complete cycle (s)
*L is length of string (m)
*g is 9.8 for Earth
Front
Period of an simple pendulum
Back
F= force equal and opposite on charges (N)
k=9x10^9
q=charge (C)
r = distance center to center
*opposite signs attract
*like signs repel
Front
Coulomb's Law
(force between charges)
Back
*direction is from positive side of battery towards negative sign of battery
I= current (Amps)
q= charge (C)
t = time
*flow of charge through a cross sectional area of wire
*equal in series (one pipe=one current)
Front
current
Back
x=vt displacement
Front
area of a velocity vs time graph
Back
k=F/x spring constant or force constant
Front
slope of a force vs stretch graph
Back
*conserve momentum only
*objects stick together
*Velcro with carts
Front
completely inelastic collisions
Back
m=F/a mass
Front
slope of a force vs acceleration graph
Back
longer means increased resistance
*one path/ one pipe/ one
*current is equal
*voltage adds up
Front
resistors in series
Back
split tension
Fcos (angle)- f =ma
N +Fsin(angle)-mg=0
Front
Newton's 2nd Law Practice
Back
*doesn't change if you go to a different planet
*period is time for one complete cycle
*use parenthesis in calculator
T= period (s)
m= mass (kg)
k= spring/force constant (N/m)
position as a function of time for simple harmonic motion (mass on spring)
Back
vector!
Watch sign for VELOCITY
Front
momentum
Back
R= resistance (ohms)
resistivity (ohm meters)
L=length (m)
A= cross-sectional area (circle for wires) (m^2)
*Longer the wire the more the resistance
*the greater the area the smaller the resistance
Front
resistance
Back
another force for freebody
Normal comes from freebody
Front
force of friction
Back
rate of energy dissipated by resistor
or rate of energy converted by battery
*P= power (watts)
*I= current (amps)
*V= electric potential difference (volts)
Front
power
Back
v= wave speed (m/s)
f=frequency (Hz)
wavelength (m)
*deceiving equation , wave speed only depends on medium
Front
wave speed
Back
vector!
change of direction means double the impulse
WATCH SIGN for VELOCITY
Front
impulse
Back
Front
adding resistors in series and parallel
Back
*This is what you assume unless told otherwise
*conserve momentum not kinetic energy
*objects do not have to stick together
Front
Inelastic collisions
Back
scalar, never negative
if you are moving you have kinetic energy