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AP Physics Formulas

Instructions:

Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can study here.
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. force of friction
(I^2)RT
(Fn)(mu)
(hc/wavelength)=h(Fo) +(Vs)
(V^2)/R

2. change in internal energy during a cyclic process
BA
0
GM*M/(r^2)
(3/2)nRdeltaT

3. formula for energy of a spring mass when spring is at maximum displacement
h/wavelength
.5KA^2
delta x = (Vo)t + .5at^2
sqrt(3KT/m)

4. EMF of a battery having internal resistance R
V+IR
delta x = (Vo)t + .5at^2
sqrt(T/(m/))
0

5. velocity of a charge traveling at a constant veloc ity through crossed E and B fields
E/B
delta x = (Vo)t + .5at^2
(Patm) + (Pgauge)
(Wnet)/(Qin)

6. heat required to melt a substance
FV
M(Lf)
(Fn)(mu)
V+IR

7. isobaric
Joules/Columb
no temp change
constant pressure
qV

8. velocity of a molecule of gas
(N2)/(N1)
sqrt(3KT/m)
(Di)/(Do) or (Hi)/(Ho)
(No)(wavelength)=(Nn)(new wavelength)

9. electric field in a distance r from a charge
-KA
GM*M/(r^2)
(N2)/(N1)
k|Q|/r^2

10. total capacitance of capacitors in series
(3/2)nRdeltaT
elastic collision
K |q||Q|/r^2
1/((1/C)+(1/C)..........)

11. formula for buoyant force
((Qin) -(Qout))/(Qin)
mV -m(Vo)
0
roeVg

12. formula for critical angle
((Qin) -(Qout))/(Qin)
1/((1/C)+(1/C)..........)
(N2)/(N1)
-KA

13. formula for torque
MC(deltaT)
perfectly inelastic collision
rF
KI/r

14. formula for constructive interference in a diffraction grating
nSintheta=nsintheta
constant volume
dSintheta=mwavelength
(N2)/(N1)

15. energy of a photon if wavelength is known
deltaU = deltaQ + deltaW
nSintheta=nsintheta
elastic collision
hc/wavelength

16. radius of curvature of a charged particle as it enters a uniform magnetic field
d/2
m(v^2)/qvB
V+IR
no force (right hand rule)

17. heat during a cyclic process (net heat)
h/wavelength
BA
(I^2)R
deltaU -deltaW

18. isometric
d/2
constant volume
no temp change
AV=(A2)(V2)

19. formula for current through the resistor when the ten coils are removed from the B field in an amount of time t
Columbs/second
hc/wavelength
(EMF)Rt/10
joules/second

20. natural frequency of an open tube of length L
Joules/Columb
1/2wavelength
((Th) -(Tl))/(Th)
deltaU = deltaQ + deltaW

21. third kinematic
frequency never changes for light problems
net work = delta K
d/2
V^2=(Vo)^2 +2a*change in x

22. adibatic
no heat flow
joules/second
qV
.5mV^2 + .5KA^2

23. natural frequency of a closed tube of length L
1/4wavelength
E/B
(N2)/(N1)
h(Fo)

24. formula for power with Voltage and resistance
(V^2)/R
constant pressure
qrB/m
(1/Do) + (1/Di) = (1/f)

25. formula for finding the qacceleration due to gravity at the surface of a planet of mass M and diameter d
deltaU -deltaW
BA
2Pi * sqrt(l/g)
G M/((d/2)^2)

26. formula to find the absoluate pressure at the bottom of a pool
(Patm) + (Pgauge)
V = (Vo) + at
deltaU -deltaW
hc/wavelength

27. hooke's law force of a spring
-KA
rF
constant volume
net work = delta K

28. equation for the first law of thermodynamics
roeVg
h/wavelength
deltaU = deltaQ + deltaW
1/2wavelength

29. energy stored in a capacitor
qV
(Patm) + (Pgauge)
(Fn)(mu)
.5CV^2 or .5 Q^2/C or .5QV

30. formula for energy of a spring mass when spring is neither at maximum displacement nor at equilibrium
rF
deltaU = deltaQ + deltaW
.5mV^2 + .5KA^2
(V^2)/R

31. forgotten power equation
L -LCostheta
FV
(V^2)/r
delta x = (Vo)t + .5at^2

32. focal length of a mirror with radius d
n(Cv)(deltaT)
M(Lf)
d/2
AV=(A2)(V2)

33. formula for power with current and voltage
VI
MC(deltaT)
no temp change
perfectly inelastic collision

34. new frequency of light as it enters a new substance
frequency never changes for light problems
no heat flow
M(Lf)
K |q||Q|/r^2

35. formula for the wavelength (debroglie wavelength) of a moving particle
no temp change
MC(deltaT)
h/wavelength
h/mv

36. formula for finding the momentum of a photon
no heat flow
sqrt(3KT/m)
BA
h/wavelength

37. formula for finding the magnetic field a distance r from a current carrying wire
KI/r
qrB/m
(hc/wavelength)=h(Fo) +(Vs)
mV -m(Vo)

38. electric potential a distance r from a charge
KQ/r
rF
hc/wavelength
nSintheta=nsintheta

39. formula used to find the heat generated by a resistor after a certain amount of time if the current through the resistor is known
mgCostheta(mu)d
FV
G M/((d/2)^2)
(I^2)RT

40. the electric force between two objects of charge Q
K |q||Q|/r^2
elastic collision
1/((1/C)+(1/C)..........)
perfectly inelastic collision

41. the force on a charge in an electric field
GM*M/(r^2)
elastic collision
joules/second
qE

42. the force on a charge moving parallel to a magnetic field
no force (right hand rule)
2Pi * sqrt(l/g)
G M/((d/2)^2)
(Di)/(Do) or (Hi)/(Ho)

43. formula for impluse involving time
MC(deltaT)
J= Ft
((Th) -(Tl))/(Th)
frequency never changes for light problems

44. units for voltage other than volts
Joules/Columb
qrB/m
KQ/r
F/A

45. isothermal
h/wavelength
no temp change
(Fn)(mu)
h/mv

46. formula for period of a pendulum
2Pi * sqrt(l/g)
(V^2)/R
0
V^2=(Vo)^2 +2a*change in x

47. formula for charge stored in a capciator
frequency never changes for light problems
qE
Q=CV
sqrt(3KT/m)

48. force a charge in a Bfield
qVB
(Fn)(mu)
Joules/Columb
roeVg

49. second kinematic
delta x = (Vo)t + .5at^2
(I^2)RT
0
elastic collision

50. heat required to change temperature of a substance
.5KA^2
V = (Vo) + at
MC(deltaT)
K |q||Q|/r^2