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AP Physics Formulas

Instructions:

Answer 50 questions in 15 minutes.
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Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.

1. what direction is friction?
deltaU = deltaQ + deltaW
opposite motion
(3/2)nRdeltaT
qE

2. formula for Carnot efficiency
.5KA^2
((Th) -(Tl))/(Th)
.5mV^2 + .5KA^2
net work = delta K

3. lens/mirror equation
net work = delta K
(Patm) + (Pgauge)
(1/Do) + (1/Di) = (1/f)
KQ/r

4. formula for efficiency not using work out
deltaU = deltaQ + deltaW
((Qin) -(Qout))/(Qin)
sqrt(T/(m/))
(I^2)R

5. units for voltage other than volts
deltaU = deltaQ + deltaW
qE
qVB
Joules/Columb

6. formula for finding the stopping potential of a metal for a wavelength if the cutoff frequency is known
Joules/Columb
h/mv
net work = delta K
(hc/wavelength)=h(Fo) +(Vs)

7. formula to find the gauge pressure at the bottom of a pool
roegh
constant volume
elastic collision
(N2)/(N1)

8. snells law
1/((1/C)+(1/C)..........)
.5KA^2
deltaU -deltaW
nSintheta=nsintheta

9. hooke's law force of a spring
qrB/m
-KA
KQ/r
(EMF)Rt/10

10. formula for height of the block (at the start of a pendulum string) in terms of theta and L
constant pressure
L -LCostheta
G M/((d/2)^2)
MC(deltaT)

11. formula for finding the energy required to move a charged particle from infinity to a point a certain distance away from a charged particle
delta x = (Vo)t + .5at^2
qV
m(v^2)/qvB
GM*M/(r^2)

12. formula used to find the heat generated by a resistor after a certain amount of time if the current through the resistor is known
constant volume
d/2
MC(deltaT)
(I^2)RT

13. equation for the first law of thermodynamics
qVB
deltaU = deltaQ + deltaW
Q=CV
h/mv

14. formula for charge stored in a capciator
Q=CV
2Pi * sqrt(l/g)
-KA
e=mc^2

15. formula for change in internal energy in a cosnstat volume PV process
(Fn)(mu)
(3/2)nRdeltaT
delta x = (Vo)t + .5at^2
E/B

16. the units of current other than amps
(Patm) + (Pgauge)
(No)(wavelength)=(Nn)(new wavelength)
Columbs/second
.5CV^2 or .5 Q^2/C or .5QV

17. natural frequency of an open tube of length L
1/2wavelength
2nt=mwavelength
d/2
0

18. work energy theorum
BA
net work = delta K
qE
d/2

19. new frequency of light as it enters a new substance
J= Ft
qrB/m
frequency never changes for light problems
no force (right hand rule)

20. isothermal
no temp change
constant pressure
KI/r
(I^2)R

21. formula for power with current and resistance
AV=(A2)(V2)
(I^2)R
F/A
(Fn)(mu)

22. EMF of a battery having internal resistance R
V+IR
2Pi * sqrt(l/g)
G M/((d/2)^2)
no force (right hand rule)

23. second kinematic
VI
-KA
opposite motion
delta x = (Vo)t + .5at^2

24. electric field in a distance r from a charge
J= Ft
k|Q|/r^2
.5CV^2 or .5 Q^2/C or .5QV
1/2wavelength

25. formula equating energy and mass
GM*M/(r^2)
e=mc^2
d/2
qV

26. formula for power with current and voltage
VI
(I^2)RT
Ed=V
constant volume

27. voltage induced in a rod moving through a uniform magnetic field
BLv
opposite motion
FV
((Qin) -(Qout))/(Qin)

28. formula for finding the magnetic field a distance r from a current carrying wire
Joules/Columb
opposite motion
KI/r
sqrt(3KT/m)

29. formula for energy of a spring mass when spring is at maximum displacement
h(Fo)
.5KA^2
L -LCostheta
G M/((d/2)^2)

30. electric potential a distance r from a charge
(N2)/(N1)
elastic collision
mgCostheta(mu)d
KQ/r

31. formula for constructive interference in a thin membrane with two phase changes
no force (right hand rule)
2nt=mwavelength
1/2wavelength
no temp change

32. the electric force between two objects of charge Q
(V^2)/R
K |q||Q|/r^2
(EMF)Rt/10
(1/Do) + (1/Di) = (1/f)

33. adibatic
1/4wavelength
no heat flow
.5mV^2 + .5KA^2
n(Cv)(deltaT)

34. total capacitance of capacitors in series
sqrt(T/(m/))
(Patm) + (Pgauge)
1/((1/C)+(1/C)..........)
mV -m(Vo)

35. formula for impluse involving time
J= Ft
deltaU -deltaW
(I^2)RT
k|Q|/r^2

36. isometric
Joules/Columb
constant volume
n(Cv)(deltaT)
AV=(A2)(V2)

37. the units of power other than watts
V = (Vo) + at
n(Cv)(deltaT)
inelastic collision
joules/second

38. new wavelength of light as it enters a new substance
no temp change
Ed=V
(No)(wavelength)=(Nn)(new wavelength)
E/B

39. formula for constructive interference in a diffraction grating
mV -m(Vo)
dSintheta=mwavelength
qVB
(V^2)/R

40. formula for torque
d/2
h/mv
K |q||Q|/r^2
rF

41. formula for period of a pendulum
(No)(wavelength)=(Nn)(new wavelength)
J= Ft
2Pi * sqrt(l/g)
constant pressure

42. formula for finding the work function of a metal if the cutoff frequency is known
h(Fo)
qrB/m
no heat flow
(Wnet)/(Qin)

43. third kinematic
V^2=(Vo)^2 +2a*change in x
sqrt(T/(m/))
roegh
qVB

44. velocity of an electrion as it exitws from the hole
1/4wavelength
qrB/m
1/2wavelength
(1/Do) + (1/Di) = (1/f)

45. formula to find the absoluate pressure at the bottom of a pool
h/wavelength
(Patm) + (Pgauge)
Joules/Columb
BA

46. type of collision where K is conserved
Q=CV
elastic collision
delta x = (Vo)t + .5at^2
deltaU -deltaW

47. velocity of a charge traveling at a constant veloc ity through crossed E and B fields
(Fn)(mu)
k|Q|/r^2
E/B
no force (right hand rule)

48. energy of a photon if wavelength is known
V^2=(Vo)^2 +2a*change in x
sqrt(T/(m/))
hc/wavelength
qVB

49. heat required to change temperature of a substance
opposite motion
MC(deltaT)
J= Ft
pL/A

50. velocity of waves on a string if tension is known
sqrt(T/(m/))
1/4wavelength
mgCostheta(mu)d
FV