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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. equation of continuity
2nt=mwavelength
qVB
(Patm) + (Pgauge)
AV=(A2)(V2)

2. the units of current other than amps
BLv
Columbs/second
G M/((d/2)^2)
V+IR

3. force of gravity between two objects of mass m
opposite motion
Columbs/second
GM*M/(r^2)
.5KA^2

4. natural frequency of an open tube of length L
1/2wavelength
sqrt(T/(m/))
qrB/m
VI

5. formula for efficiency not using work out
((Qin) -(Qout))/(Qin)
1/2wavelength
no heat flow
n(Cv)(deltaT)

6. formula for Carnot efficiency
-KA
((Th) -(Tl))/(Th)
Q=CV
opposite motion

7. change in internal energy during a cyclic process
(3/2)nRdeltaT
KQ/r
delta x = (Vo)t + .5at^2
0

8. formula for finding the qacceleration due to gravity at the surface of a planet of mass M and diameter d
KQ/r
G M/((d/2)^2)
V^2=(Vo)^2 +2a*change in x
(V^2)/R

9. force of frction on an incline
mgCostheta(mu)d
h(Fo)
opposite motion
GM*M/(r^2)

10. formula for finding the magnetic field a distance r from a current carrying wire
qrB/m
(I^2)R
KI/r
inelastic collision

11. heat required to change temperature of a substance
AV=(A2)(V2)
GM*M/(r^2)
MC(deltaT)
2Pi * sqrt(l/g)

12. what direction is friction?
opposite motion
0
deltaU = deltaQ + deltaW
Joules/Columb

13. the force on a charge in an electric field
e=mc^2
d/2
qE
2nt=mwavelength

14. formula for buoyant force
sqrt(T/(m/))
roeVg
(N2)/(N1)
no heat flow

15. formula for power with Voltage and resistance
E/B
(V^2)/R
.5KA^2
MC(deltaT)

16. formula for energy of a spring mass when spring is neither at maximum displacement nor at equilibrium
nSintheta=nsintheta
V+IR
.5mV^2 + .5KA^2
no heat flow

17. isothermal
dSintheta=mwavelength
no force (right hand rule)
no temp change
G M/((d/2)^2)

18. formula used to find the heat generated by a resistor after a certain amount of time if the current through the resistor is known
qrB/m
qE
(I^2)RT
roegh

19. formula for finding the work function of a metal if the cutoff frequency is known
VI
pL/A
.5KA^2
h(Fo)

20. electric field in a distance r from a charge
(hc/wavelength)=h(Fo) +(Vs)
1/((1/C)+(1/C)..........)
k|Q|/r^2
(1/Do) + (1/Di) = (1/f)

21. formula for finding the stopping potential of a metal for a wavelength if the cutoff frequency is known
(EMF)Rt/10
(hc/wavelength)=h(Fo) +(Vs)
.5mV^2 + .5KA^2
Joules/Columb

22. velocity of a molecule of gas
Joules/Columb
L -LCostheta
(Fn)(mu)
sqrt(3KT/m)

23. the electric force between two objects of charge Q
K |q||Q|/r^2
(N2)/(N1)
dSintheta=mwavelength
no temp change

24. the units of power other than watts
elastic collision
KQ/r
joules/second
nSintheta=nsintheta

25. velocity of an electrion as it exitws from the hole
V^2=(Vo)^2 +2a*change in x
opposite motion
sqrt(3KT/m)
qrB/m

26. formula to find the absoluate pressure at the bottom of a pool
(Patm) + (Pgauge)
FV
Joules/Columb
no heat flow

27. pressure
h(Fo)
F/A
AV=(A2)(V2)
(Di)/(Do) or (Hi)/(Ho)

28. units for voltage other than volts
delta x = (Vo)t + .5at^2
Joules/Columb
1/((1/C)+(1/C)..........)
elastic collision

29. formula for impluse involving time
h/mv
J= Ft
((Th) -(Tl))/(Th)
1/4wavelength

30. adibatic
J= Ft
hc/wavelength
(EMF)Rt/10
no heat flow

31. formula for power with current and voltage
1/((1/C)+(1/C)..........)
VI
GM*M/(r^2)
roegh

32. formula for impulse involving momentum
delta x = (Vo)t + .5at^2
mV -m(Vo)
VI
Ed=V

33. formula for torque
Columbs/second
opposite motion
V = (Vo) + at
rF

34. magnification equation
net work = delta K
(Di)/(Do) or (Hi)/(Ho)
1/4wavelength
e=mc^2

35. formula equating energy and mass
m(v^2)/qvB
Q=CV
sqrt(T/(m/))
e=mc^2

36. formula for finding magnetic flux
BA
(V^2)/R
qE
roegh

37. focal length of a mirror with radius d
d/2
2nt=mwavelength
V = (Vo) + at
h(Fo)

38. voltage induced in a rod moving through a uniform magnetic field
BLv
K |q||Q|/r^2
.5CV^2 or .5 Q^2/C or .5QV
qE

39. formula for efficiency of a heat engine using work out
sqrt(3KT/m)
constant pressure
Ed=V
(Wnet)/(Qin)

40. formula relating voltage and electric field
Ed=V
.5KA^2
Q=CV
KQ/r

41. formula for critical angle
frequency never changes for light problems
(N2)/(N1)
Ed=V
roegh

42. snells law
nSintheta=nsintheta
no force (right hand rule)
roegh
constant pressure

43. formula for centripetal acceleration
AV=(A2)(V2)
h/mv
(V^2)/r
d/2

44. formula to find the gauge pressure at the bottom of a pool
no force (right hand rule)
roegh
(Wnet)/(Qin)
hc/wavelength

45. work energy theorum
V^2=(Vo)^2 +2a*change in x
net work = delta K
KQ/r
(3/2)nRdeltaT

46. formula for the wavelength (debroglie wavelength) of a moving particle
(V^2)/r
h/wavelength
delta x = (Vo)t + .5at^2
h/mv

47. formula for constructive interference in a diffraction grating
mV -m(Vo)
joules/second
dSintheta=mwavelength
no force (right hand rule)

48. type of collision where K is not conserved
VI
-KA
J= Ft
inelastic collision

49. equation for the first law of thermodynamics
qVB
deltaU = deltaQ + deltaW
net work = delta K
sqrt(T/(m/))

50. formula for power with current and resistance
VI
FV
(I^2)R
((Th) -(Tl))/(Th)