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AP Physics Formulas

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Answer 50 questions in 15 minutes.
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1. formula for energy of a spring mass when spring is at maximum displacement
.5KA^2
sqrt(3KT/m)
V^2=(Vo)^2 +2a*change in x
perfectly inelastic collision

2. formula for impluse involving time
J= Ft
KI/r
KQ/r
.5CV^2 or .5 Q^2/C or .5QV

3. formula for critical angle
KQ/r
K |q||Q|/r^2
(N2)/(N1)
m(v^2)/qvB

4. formula for finding the qacceleration due to gravity at the surface of a planet of mass M and diameter d
Columbs/second
VI
G M/((d/2)^2)
BA

5. the electric force between two objects of charge Q
deltaU -deltaW
no heat flow
K |q||Q|/r^2
h(Fo)

6. second kinematic
FV
delta x = (Vo)t + .5at^2
KI/r
Ed=V

7. formula for constructive interference in a thin membrane with two phase changes
Q=CV
2nt=mwavelength
inelastic collision
d/2

8. isometric
constant volume
nSintheta=nsintheta
e=mc^2
M(Lf)

9. formula for charge stored in a capciator
Columbs/second
.5KA^2
Q=CV
deltaU = deltaQ + deltaW

10. formula for Carnot efficiency
dSintheta=mwavelength
-KA
((Th) -(Tl))/(Th)
frequency never changes for light problems

11. voltage induced in a rod moving through a uniform magnetic field
no temp change
BLv
constant pressure
no heat flow

12. electric field in a distance r from a charge
k|Q|/r^2
qV
(I^2)RT
qrB/m

13. forgotten power equation
V = (Vo) + at
(V^2)/r
FV
E/B

14. formula to find the gauge pressure at the bottom of a pool
pL/A
roegh
0
elastic collision

15. focal length of a mirror with radius d
KI/r
G M/((d/2)^2)
d/2
(I^2)RT

16. formula for buoyant force
MC(deltaT)
roeVg
sqrt(3KT/m)
AV=(A2)(V2)

17. change in internal energy during a cyclic process
(EMF)Rt/10
((Qin) -(Qout))/(Qin)
0
GM*M/(r^2)

18. pressure
no force (right hand rule)
F/A
1/4wavelength
Columbs/second

19. formula for change in internal energy in a cosnstat volume PV process
(3/2)nRdeltaT
BA
G M/((d/2)^2)
2nt=mwavelength

20. velocity of a charge traveling at a constant veloc ity through crossed E and B fields
L -LCostheta
GM*M/(r^2)
e=mc^2
E/B

21. formula for power with current and voltage
h(Fo)
VI
joules/second
(Di)/(Do) or (Hi)/(Ho)

22. formula for constructive interference in a diffraction grating
(No)(wavelength)=(Nn)(new wavelength)
.5mV^2 + .5KA^2
dSintheta=mwavelength
inelastic collision

23. natural frequency of an open tube of length L
(1/Do) + (1/Di) = (1/f)
1/2wavelength
2nt=mwavelength
hc/wavelength

24. work energy theorum
(Fn)(mu)
net work = delta K
k|Q|/r^2
KI/r

25. formula for finding the energy required to move a charged particle from infinity to a point a certain distance away from a charged particle
Joules/Columb
(Di)/(Do) or (Hi)/(Ho)
qV
elastic collision

26. formula for current through the resistor when the ten coils are removed from the B field in an amount of time t
qrB/m
(EMF)Rt/10
(1/Do) + (1/Di) = (1/f)
mgCostheta(mu)d

27. the force on a charge moving parallel to a magnetic field
pL/A
2nt=mwavelength
no force (right hand rule)
h(Fo)

28. third kinematic
hc/wavelength
constant volume
V^2=(Vo)^2 +2a*change in x
no force (right hand rule)

29. new frequency of light as it enters a new substance
nSintheta=nsintheta
G M/((d/2)^2)
frequency never changes for light problems
pL/A

30. force of frction on an incline
mgCostheta(mu)d
sqrt(3KT/m)
K |q||Q|/r^2
no temp change

31. the units of power other than watts
qE
(I^2)RT
joules/second
(V^2)/R

32. force of gravity between two objects of mass m
deltaU = deltaQ + deltaW
((Th) -(Tl))/(Th)
GM*M/(r^2)
pL/A

33. formula for the wavelength (debroglie wavelength) of a moving particle
(I^2)RT
(Fn)(mu)
h/mv
(N2)/(N1)

34. radius of curvature of a charged particle as it enters a uniform magnetic field
m(v^2)/qvB
2Pi * sqrt(l/g)
(1/Do) + (1/Di) = (1/f)
(I^2)RT

35. heat required to change temperature of a substance
V+IR
(EMF)Rt/10
Joules/Columb
MC(deltaT)

36. heat during a cyclic process (net heat)
dSintheta=mwavelength
deltaU -deltaW
nSintheta=nsintheta
d/2

37. formula for torque
M(Lf)
rF
KQ/r
sqrt(T/(m/))

38. the force on a charge in an electric field
qE
G M/((d/2)^2)
pL/A
BLv

39. what direction is friction?
V^2=(Vo)^2 +2a*change in x
KQ/r
V+IR
opposite motion

40. heat during an isometric process
G M/((d/2)^2)
n(Cv)(deltaT)
FV
(1/Do) + (1/Di) = (1/f)

41. natural frequency of a closed tube of length L
deltaU -deltaW
GM*M/(r^2)
(EMF)Rt/10
1/4wavelength

42. equation of continuity
V^2=(Vo)^2 +2a*change in x
mgCostheta(mu)d
AV=(A2)(V2)
opposite motion

43. formula for finding the magnetic field a distance r from a current carrying wire
KI/r
qV
e=mc^2
qVB

44. new wavelength of light as it enters a new substance
(No)(wavelength)=(Nn)(new wavelength)
deltaU = deltaQ + deltaW
(hc/wavelength)=h(Fo) +(Vs)
dSintheta=mwavelength

45. formula for height of the block (at the start of a pendulum string) in terms of theta and L
L -LCostheta
frequency never changes for light problems
-KA
Columbs/second

46. lens/mirror equation
(Di)/(Do) or (Hi)/(Ho)
(1/Do) + (1/Di) = (1/f)
deltaU = deltaQ + deltaW
Ed=V

47. isobaric
2nt=mwavelength
.5mV^2 + .5KA^2
constant pressure
J= Ft

48. type of collision where objects stick togerther
perfectly inelastic collision
BLv
KI/r
joules/second

49. electric potential a distance r from a charge
1/((1/C)+(1/C)..........)
V^2=(Vo)^2 +2a*change in x
KQ/r
Columbs/second

50. formula equating energy and mass
sqrt(T/(m/))
constant volume
e=mc^2
rF

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AP Physics Formulas

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