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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. formula for efficiency of a heat engine using work out
GM*M/(r^2)
(V^2)/r
sqrt(3KT/m)
(Wnet)/(Qin)

2. snells law
.5CV^2 or .5 Q^2/C or .5QV
AV=(A2)(V2)
nSintheta=nsintheta
KI/r

3. change in internal energy during a cyclic process
0
h/mv
Ed=V
F/A

4. what direction is friction?
delta x = (Vo)t + .5at^2
opposite motion
deltaU = deltaQ + deltaW
k|Q|/r^2

5. formula for energy of a spring mass when spring is at maximum displacement
.5KA^2
(1/Do) + (1/Di) = (1/f)
d/2
(N2)/(N1)

6. formula for change in internal energy in a cosnstat volume PV process
(N2)/(N1)
FV
(3/2)nRdeltaT
no temp change

7. formula for finding the magnetic field a distance r from a current carrying wire
KI/r
M(Lf)
MC(deltaT)
V^2=(Vo)^2 +2a*change in x

8. magnification equation
(Di)/(Do) or (Hi)/(Ho)
h/wavelength
constant pressure
perfectly inelastic collision

9. formula for power with current and resistance
no temp change
k|Q|/r^2
(I^2)R
2nt=mwavelength

10. units for voltage other than volts
Joules/Columb
0
qrB/m
delta x = (Vo)t + .5at^2

11. radius of curvature of a charged particle as it enters a uniform magnetic field
(3/2)nRdeltaT
joules/second
(Patm) + (Pgauge)
m(v^2)/qvB

12. adibatic
sqrt(T/(m/))
E/B
1/2wavelength
no heat flow

13. formula for efficiency not using work out
BLv
F/A
((Qin) -(Qout))/(Qin)
sqrt(T/(m/))

14. formula for finding magnetic flux
(hc/wavelength)=h(Fo) +(Vs)
BA
n(Cv)(deltaT)
(No)(wavelength)=(Nn)(new wavelength)

15. hooke's law force of a spring
-KA
qE
frequency never changes for light problems
qrB/m

16. energy of a photon if wavelength is known
M(Lf)
F/A
roeVg
hc/wavelength

17. heat required to melt a substance
1/((1/C)+(1/C)..........)
(EMF)Rt/10
M(Lf)
pL/A

18. formula for period of a pendulum
1/2wavelength
h(Fo)
E/B
2Pi * sqrt(l/g)

19. formula used to find the heat generated by a resistor after a certain amount of time if the current through the resistor is known
elastic collision
h(Fo)
(I^2)RT
qE

20. heat during a cyclic process (net heat)
deltaU -deltaW
d/2
deltaU = deltaQ + deltaW
no force (right hand rule)

21. formula for the wavelength (debroglie wavelength) of a moving particle
rF
h/wavelength
h/mv
deltaU -deltaW

22. type of collision where K is conserved
elastic collision
-KA
(V^2)/r
BLv

23. natural frequency of an open tube of length L
FV
1/2wavelength
net work = delta K
Q=CV

24. velocity of an electrion as it exitws from the hole
perfectly inelastic collision
opposite motion
qrB/m
sqrt(3KT/m)

25. formula for torque
net work = delta K
hc/wavelength
E/B
rF

26. formula to find the gauge pressure at the bottom of a pool
pL/A
no force (right hand rule)
qE
roegh

27. isothermal
KI/r
net work = delta K
no temp change
-KA

28. formula for finding the stopping potential of a metal for a wavelength if the cutoff frequency is known
(No)(wavelength)=(Nn)(new wavelength)
(V^2)/R
(hc/wavelength)=h(Fo) +(Vs)
(Fn)(mu)

29. total capacitance of capacitors in series
M(Lf)
KQ/r
1/((1/C)+(1/C)..........)
qV

30. type of collision where K is not conserved
net work = delta K
qrB/m
constant volume
inelastic collision

31. pressure
J= Ft
FV
dSintheta=mwavelength
F/A

32. the units of power other than watts
roeVg
Ed=V
joules/second
(Fn)(mu)

33. focal length of a mirror with radius d
opposite motion
qV
roegh
d/2

34. formula for constructive interference in a diffraction grating
.5KA^2
deltaU = deltaQ + deltaW
dSintheta=mwavelength
AV=(A2)(V2)

35. velocity of a molecule of gas
sqrt(3KT/m)
h(Fo)
no heat flow
m(v^2)/qvB

36. force of friction
1/2wavelength
(I^2)R
opposite motion
(Fn)(mu)

37. velocity of a charge traveling at a constant veloc ity through crossed E and B fields
0
E/B
net work = delta K
(Wnet)/(Qin)

38. work energy theorum
(No)(wavelength)=(Nn)(new wavelength)
FV
(Di)/(Do) or (Hi)/(Ho)
net work = delta K

39. formula for finding the energy required to move a charged particle from infinity to a point a certain distance away from a charged particle
constant pressure
VI
qV
deltaU = deltaQ + deltaW

40. new frequency of light as it enters a new substance
2Pi * sqrt(l/g)
frequency never changes for light problems
roegh
h(Fo)

41. electric field in a distance r from a charge
MC(deltaT)
k|Q|/r^2
deltaU -deltaW
J= Ft

42. heat required to change temperature of a substance
mgCostheta(mu)d
h(Fo)
pL/A
MC(deltaT)

43. equation of continuity
pL/A
AV=(A2)(V2)
delta x = (Vo)t + .5at^2
nSintheta=nsintheta

44. force of gravity between two objects of mass m
GM*M/(r^2)
((Th) -(Tl))/(Th)
inelastic collision
E/B

45. velocity of waves on a string if tension is known
net work = delta K
sqrt(T/(m/))
K |q||Q|/r^2
BLv

46. formula for impluse involving time
J= Ft
hc/wavelength
roegh
net work = delta K

47. EMF of a battery having internal resistance R
(Di)/(Do) or (Hi)/(Ho)
V+IR
1/((1/C)+(1/C)..........)
sqrt(T/(m/))

48. second kinematic
M(Lf)
G M/((d/2)^2)
2Pi * sqrt(l/g)
delta x = (Vo)t + .5at^2

49. formula for buoyant force
(V^2)/r
roeVg
deltaU = deltaQ + deltaW
(N2)/(N1)

50. resistance of a wire
(Di)/(Do) or (Hi)/(Ho)
n(Cv)(deltaT)
pL/A
opposite motion