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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. force of gravity between two objects of mass m
joules/second
GM*M/(r^2)
2Pi * sqrt(l/g)
Columbs/second

2. the electric force between two objects of charge Q
(hc/wavelength)=h(Fo) +(Vs)
K |q||Q|/r^2
(Di)/(Do) or (Hi)/(Ho)
mV -m(Vo)

3. formula for constructive interference in a thin membrane with two phase changes
deltaU = deltaQ + deltaW
((Th) -(Tl))/(Th)
2nt=mwavelength
frequency never changes for light problems

4. isometric
constant volume
(V^2)/R
M(Lf)
sqrt(3KT/m)

5. resistance of a wire
no heat flow
pL/A
deltaU = deltaQ + deltaW
V+IR

6. energy of a photon if wavelength is known
((Th) -(Tl))/(Th)
.5KA^2
(Fn)(mu)
hc/wavelength

7. new wavelength of light as it enters a new substance
(I^2)R
AV=(A2)(V2)
(No)(wavelength)=(Nn)(new wavelength)
joules/second

8. formula for critical angle
V+IR
(N2)/(N1)
K |q||Q|/r^2
delta x = (Vo)t + .5at^2

9. first kinematic
(hc/wavelength)=h(Fo) +(Vs)
qrB/m
V = (Vo) + at
KQ/r

10. isobaric
constant pressure
L -LCostheta
Columbs/second
(3/2)nRdeltaT

11. heat during a cyclic process (net heat)
0
e=mc^2
deltaU -deltaW
delta x = (Vo)t + .5at^2

12. formula for finding the qacceleration due to gravity at the surface of a planet of mass M and diameter d
G M/((d/2)^2)
V+IR
2Pi * sqrt(l/g)
m(v^2)/qvB

13. formula for period of a pendulum
V+IR
(Fn)(mu)
mgCostheta(mu)d
2Pi * sqrt(l/g)

14. hooke's law force of a spring
(1/Do) + (1/Di) = (1/f)
MC(deltaT)
mV -m(Vo)
-KA

15. natural frequency of a closed tube of length L
frequency never changes for light problems
1/4wavelength
(Patm) + (Pgauge)
-KA

16. formula for height of the block (at the start of a pendulum string) in terms of theta and L
L -LCostheta
E/B
joules/second
deltaU -deltaW

17. formula used to find the heat generated by a resistor after a certain amount of time if the current through the resistor is known
L -LCostheta
-KA
(I^2)RT
deltaU -deltaW

18. formula for finding the stopping potential of a metal for a wavelength if the cutoff frequency is known
(hc/wavelength)=h(Fo) +(Vs)
qV
(I^2)RT
(I^2)R

19. equation for the first law of thermodynamics
no heat flow
deltaU = deltaQ + deltaW
roegh
Columbs/second

20. formula for finding the momentum of a photon
h/wavelength
perfectly inelastic collision
((Qin) -(Qout))/(Qin)
2nt=mwavelength

21. units for voltage other than volts
Joules/Columb
2Pi * sqrt(l/g)
pL/A
roeVg

22. natural frequency of an open tube of length L
L -LCostheta
(N2)/(N1)
perfectly inelastic collision
1/2wavelength

23. snells law
nSintheta=nsintheta
dSintheta=mwavelength
delta x = (Vo)t + .5at^2
K |q||Q|/r^2

24. the units of power other than watts
rF
(1/Do) + (1/Di) = (1/f)
joules/second
((Qin) -(Qout))/(Qin)

25. heat during an isometric process
KQ/r
(Fn)(mu)
((Qin) -(Qout))/(Qin)
n(Cv)(deltaT)

26. force of frction on an incline
nSintheta=nsintheta
mgCostheta(mu)d
V+IR
e=mc^2

27. type of collision where K is not conserved
V^2=(Vo)^2 +2a*change in x
(3/2)nRdeltaT
inelastic collision
.5CV^2 or .5 Q^2/C or .5QV

28. isothermal
V+IR
roeVg
AV=(A2)(V2)
no temp change

29. electric field in a distance r from a charge
K |q||Q|/r^2
k|Q|/r^2
mgCostheta(mu)d
(1/Do) + (1/Di) = (1/f)

30. magnification equation
((Th) -(Tl))/(Th)
deltaU -deltaW
e=mc^2
(Di)/(Do) or (Hi)/(Ho)

31. formula for impluse involving time
J= Ft
rF
Ed=V
BLv

32. type of collision where K is conserved
pL/A
V+IR
deltaU -deltaW
elastic collision

33. lens/mirror equation
inelastic collision
((Th) -(Tl))/(Th)
V = (Vo) + at
(1/Do) + (1/Di) = (1/f)

34. formula for power with Voltage and resistance
qE
0
(V^2)/R
(Wnet)/(Qin)

35. 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
E/B
1/4wavelength
F/A

36. the force on a charge moving parallel to a magnetic field
J= Ft
no force (right hand rule)
no temp change
constant volume

37. type of collision where objects stick togerther
(1/Do) + (1/Di) = (1/f)
delta x = (Vo)t + .5at^2
(V^2)/r
perfectly inelastic collision

38. pressure
nSintheta=nsintheta
qV
1/2wavelength
F/A

39. formula for energy of a spring mass when spring is at maximum displacement
constant volume
((Th) -(Tl))/(Th)
.5KA^2
E/B

40. formula equating energy and mass
((Qin) -(Qout))/(Qin)
dSintheta=mwavelength
deltaU -deltaW
e=mc^2

41. heat required to melt a substance
KI/r
M(Lf)
MC(deltaT)
.5CV^2 or .5 Q^2/C or .5QV

42. third kinematic
V^2=(Vo)^2 +2a*change in x
1/2wavelength
(3/2)nRdeltaT
FV

43. EMF of a battery having internal resistance R
Ed=V
roeVg
V+IR
.5mV^2 + .5KA^2

44. formula for torque
(1/Do) + (1/Di) = (1/f)
1/((1/C)+(1/C)..........)
rF
0

45. electric potential a distance r from a charge
KQ/r
F/A
opposite motion
FV

46. formula for efficiency not using work out
((Qin) -(Qout))/(Qin)
no force (right hand rule)
d/2
constant pressure

47. formula for buoyant force
roeVg
no force (right hand rule)
roegh
-KA

48. velocity of a charge traveling at a constant veloc ity through crossed E and B fields
n(Cv)(deltaT)
Q=CV
E/B
qV

49. change in internal energy during a cyclic process
0
.5CV^2 or .5 Q^2/C or .5QV
.5mV^2 + .5KA^2
m(v^2)/qvB

50. formula for energy of a spring mass when spring is neither at maximum displacement nor at equilibrium
V = (Vo) + at
perfectly inelastic collision
.5mV^2 + .5KA^2
(Wnet)/(Qin)

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AP Physics Formulas

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