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AP Physics Formulas

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Answer 50 questions in 15 minutes.
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Match each statement with the correct term.
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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 height of the block (at the start of a pendulum string) in terms of theta and L
G M/((d/2)^2)
delta x = (Vo)t + .5at^2
(EMF)Rt/10
L -LCostheta

2. electric field in a distance r from a charge
k|Q|/r^2
deltaU = deltaQ + deltaW
((Qin) -(Qout))/(Qin)
KI/r

3. formula for period of a pendulum
Columbs/second
2Pi * sqrt(l/g)
qVB
KQ/r

4. formula equating energy and mass
net work = delta K
e=mc^2
qrB/m
FV

5. heat required to change temperature of a substance
MC(deltaT)
n(Cv)(deltaT)
delta x = (Vo)t + .5at^2
2Pi * sqrt(l/g)

6. equation of continuity
Ed=V
V = (Vo) + at
AV=(A2)(V2)
0

7. type of collision where K is conserved
FV
k|Q|/r^2
elastic collision
(V^2)/R

8. type of collision where objects stick togerther
no temp change
constant pressure
perfectly inelastic collision
GM*M/(r^2)

9. work energy theorum
net work = delta K
Ed=V
(3/2)nRdeltaT
(Patm) + (Pgauge)

10. formula for finding the momentum of a photon
(N2)/(N1)
h/wavelength
no temp change
1/2wavelength

11. force of gravity between two objects of mass m
k|Q|/r^2
1/4wavelength
GM*M/(r^2)
deltaU = deltaQ + deltaW

12. force a charge in a Bfield
qVB
(1/Do) + (1/Di) = (1/f)
nSintheta=nsintheta
(I^2)R

13. velocity of an electrion as it exitws from the hole
qrB/m
KQ/r
e=mc^2
dSintheta=mwavelength

14. change in internal energy during a cyclic process
0
1/((1/C)+(1/C)..........)
.5CV^2 or .5 Q^2/C or .5QV
M(Lf)

15. formula used to find the heat generated by a resistor after a certain amount of time if the current through the resistor is known
.5mV^2 + .5KA^2
(I^2)RT
BLv
(1/Do) + (1/Di) = (1/f)

16. formula for constructive interference in a diffraction grating
dSintheta=mwavelength
F/A
Columbs/second
m(v^2)/qvB

17. the units of power other than watts
joules/second
(V^2)/R
mgCostheta(mu)d
n(Cv)(deltaT)

18. the force on a charge in an electric field
2nt=mwavelength
qE
KQ/r
elastic collision

19. formula to find the absoluate pressure at the bottom of a pool
roegh
constant pressure
(Patm) + (Pgauge)
m(v^2)/qvB

20. formula for finding the qacceleration due to gravity at the surface of a planet of mass M and diameter d
(Wnet)/(Qin)
Ed=V
G M/((d/2)^2)
V = (Vo) + at

21. velocity of a molecule of gas
nSintheta=nsintheta
sqrt(3KT/m)
V+IR
hc/wavelength

22. isometric
constant volume
qV
k|Q|/r^2
Q=CV

23. formula for critical angle
delta x = (Vo)t + .5at^2
(N2)/(N1)
GM*M/(r^2)
qV

24. new wavelength of light as it enters a new substance
Columbs/second
(No)(wavelength)=(Nn)(new wavelength)
constant volume
(3/2)nRdeltaT

25. hooke's law force of a spring
0
-KA
m(v^2)/qvB
deltaU = deltaQ + deltaW

26. natural frequency of a closed tube of length L
inelastic collision
KI/r
mgCostheta(mu)d
1/4wavelength

27. the units of current other than amps
roeVg
d/2
Columbs/second
mV -m(Vo)

28. focal length of a mirror with radius d
FV
V^2=(Vo)^2 +2a*change in x
d/2
.5KA^2

29. forgotten power equation
FV
frequency never changes for light problems
V+IR
(Patm) + (Pgauge)

30. units for voltage other than volts
2Pi * sqrt(l/g)
J= Ft
(N2)/(N1)
Joules/Columb

31. formula for finding the magnetic field a distance r from a current carrying wire
M(Lf)
qV
(V^2)/r
KI/r

32. natural frequency of an open tube of length L
1/2wavelength
E/B
m(v^2)/qvB
-KA

33. formula for buoyant force
J= Ft
(hc/wavelength)=h(Fo) +(Vs)
n(Cv)(deltaT)
roeVg

34. resistance of a wire
rF
1/((1/C)+(1/C)..........)
pL/A
elastic collision

35. formula for change in internal energy in a cosnstat volume PV process
(3/2)nRdeltaT
mgCostheta(mu)d
(Di)/(Do) or (Hi)/(Ho)
(No)(wavelength)=(Nn)(new wavelength)

36. formula for impulse involving momentum
1/((1/C)+(1/C)..........)
mV -m(Vo)
GM*M/(r^2)
no temp change

37. 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
elastic collision
BA
sqrt(3KT/m)

38. isothermal
no temp change
(N2)/(N1)
FV
G M/((d/2)^2)

39. new frequency of light as it enters a new substance
F/A
frequency never changes for light problems
h(Fo)
GM*M/(r^2)

40. second kinematic
delta x = (Vo)t + .5at^2
no temp change
1/4wavelength
qVB

41. the force on a charge moving parallel to a magnetic field
.5KA^2
no force (right hand rule)
Joules/Columb
0

42. equation for the first law of thermodynamics
K |q||Q|/r^2
BLv
deltaU = deltaQ + deltaW
(Di)/(Do) or (Hi)/(Ho)

43. formula for finding the work function of a metal if the cutoff frequency is known
E/B
h(Fo)
(V^2)/r
k|Q|/r^2

44. magnification equation
(Di)/(Do) or (Hi)/(Ho)
.5mV^2 + .5KA^2
.5KA^2
G M/((d/2)^2)

45. formula for finding the energy required to move a charged particle from infinity to a point a certain distance away from a charged particle
inelastic collision
m(v^2)/qvB
perfectly inelastic collision
qV

46. the electric force between two objects of charge Q
constant pressure
K |q||Q|/r^2
E/B
qE

47. formula for power with current and voltage
VI
roeVg
GM*M/(r^2)
hc/wavelength

48. force of frction on an incline
((Th) -(Tl))/(Th)
(hc/wavelength)=h(Fo) +(Vs)
FV
mgCostheta(mu)d

49. what direction is friction?
VI
2nt=mwavelength
.5KA^2
opposite motion

50. formula for centripetal acceleration
(V^2)/r
.5KA^2
frequency never changes for light problems
(No)(wavelength)=(Nn)(new wavelength)

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AP Physics Formulas

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