87 terms

# Physics AP review formulas

I have used parantheses to group variables/constants with any sub letters theta is spelled delta is spelled square root is sqrt() mu is spelled
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first kinematic
V = (Vo) + at
second kinematic
delta x = (Vo)t + .5at^2
third kinematic
V^2=(Vo)^2 +2a*change in x
force of gravity between two objects of mass m
GM*M/(r^2)
the electric force between two objects of charge Q
K |q||Q|/r^2
formula for finding the qacceleration due to gravity at the surface of a planet of mass M and diameter d
G M/((d/2)^2)
formula for energy of a spring mass when spring is at maximum displacement
.5KA^2
formula for energy of a spring mass when spring is neither at maximum displacement nor at equilibrium
.5mV^2 + .5KA^2
formula for period of a pendulum
2Pi * sqrt(l/g)
formula for impluse involving time
J= Ft
formula for impulse involving momentum
mV-m(Vo)
formula for height of the block (at the start of a pendulum string) in terms of theta and L
L-LCostheta
no heat flow
isobaric
constant pressure
isothermal
no temp change
isometric
constant volume
heat required to change temperature of a substance
MC(deltaT)
heat required to melt a substance
M(Lf)
heat during an isometric process
n(Cv)(deltaT)
heat during a cyclic process (net heat)
deltaU -deltaW
formula for efficiency of a heat engine using work out
(Wnet)/(Qin)
formula for efficiency not using work out
((Qin)-(Qout))/(Qin)
formula for Carnot efficiency
((Th)-(Tl))/(Th)
what direction is friction?
opposite motion
force of friction
(Fn)(mu)
force of frction on an incline
mgCostheta(mu)d
EMF of a battery having internal resistance R
V+IR
equation for the first law of thermodynamics
deltaU = deltaQ + deltaW
formula for the wavelength (debroglie wavelength) of a moving particle
h/mv
formula for change in internal energy in a cosnstat volume PV process
(3/2)nRdeltaT
formula for finding the momentum of a photon
h/wavelength
formula for current through the resistor when the ten coils are removed from the B field in an amount of time t
(EMF)Rt/10
voltage induced in a rod moving through a uniform magnetic field
BLv
formula for power with current and resistance
(I^2)R
formula for power with current and voltage
VI
formula for power with Voltage and resistance
(V^2)/R
forgotten power equation
FV
formula for finding magnetic flux
BA
new wavelength of light as it enters a new substance
(No)(wavelength)=(Nn)(new wavelength)
new frequency of light as it enters a new substance
frequency never changes for light problems
formula for finding the work function of a metal if the cutoff frequency is known
h(Fo)
formula used to find the heat generated by a resistor after a certain amount of time if the current through the resistor is known
(I^2)RT
units for voltage other than volts
Joules/Columb
change in internal energy during a cyclic process
0
formula relating voltage and electric field
Ed=V
formula for charge stored in a capciator
Q=CV
energy stored in a capacitor
.5CV^2 or .5 Q^2/C or .5QV
electric field in a distance r from a charge
k|Q|/r^2
electric potential a distance r from a charge
KQ/r
formula for finding the stopping potential of a metal for a wavelength if the cutoff frequency is known
(hc/wavelength)=h(Fo) +(Vs)
formula for finding the energy required to move a charged particle from infinity to a point a certain distance away from a charged particle
qV
formula for finding the magnetic field a distance r from a current carrying wire
KI/r
velocity of an electrion as it exitws from the hole
qrB/m
radius of curvature of a charged particle as it enters a uniform magnetic field
m(v^2)/qvB
the units of current other than amps
Columbs/second
the units of power other than watts
joules/second
the force on a charge in an electric field
qE
the force on a charge moving parallel to a magnetic field
no force (right hand rule)
formula to find the gauge pressure at the bottom of a pool
roegh
formula to find the absoluate pressure at the bottom of a pool
(Patm) + (Pgauge)
equation of continuity
AV=(A2)(V2)
pressure
F/A
formula for torque
rF
velocity of waves on a string if tension is known
sqrt(T/(m/))
formula for centripetal acceleration
(V^2)/r
work energy theorum
net work = delta K
total capacitance of capacitors in series
1/((1/C)+(1/C)..........)
velocity of a molecule of gas
sqrt(3KT/m)
snells law
nSintheta=nsintheta
formula equating energy and mass
e=mc^2
energy of a photon if wavelength is known
hc/wavelength
lens/mirror equation
(1/Do) + (1/Di) = (1/f)
natural frequency of an open tube of length L
1/2wavelength
natural frequency of a closed tube of length L
1/4wavelength
resistance of a wire
pL/A
force a charge in a Bfield
qVB
magnification equation
(Di)/(Do) or (Hi)/(Ho)
formula for constructive interference in a diffraction grating (the chart!)
dSintheta=mwavelength
formula for buoyant force
roeVg
formula for critical angle
(N2)/(N1)
hooke's law
force of a spring = -KA
velocity of a charge traveling at a constant veloc ity through crossed E and B fields
E/B
focal length of a mirror with radius d
d/2
formula for constructive interference in a thin membrane with two phase changes
2nt=mwavelength
type of collision where K is conserved
elastic collision
type of collision where K is not conserved
inelastic collision
type of collision where objects stick togerther
perfectly inelastic collision