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AP Physics B: Formulas

Instructions:

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. K = (3/2)kT
Fy=FnCos?-Fg
E=F/q (point charge)=KQ1/r² BREAK INTO VECTORS
Average Molecular Kinetic Energy
P=IV

2. Specific gravity
SG=rho object/10³
q=K?AT/L
Force of Spring
Archimedes Principle/Bouyancy

3. T = 1/f
Average Molecular Kinetic Energy
T=2pvm/k
Adiabatic and isothermal processes ec= TH-TL/
Period in General

4. Banked curve - sum of the forces in the y
F=Bvsin?q
t=Fr - force must be perpendicular to the moment arm and the axis of rotation
Kinematic with Displacement - Velocity - Acceleration - and Time
Fy=FnCos?-Fg

5. e = abs(W/Q)
Fgx=FgCos?
Constructive: 2t=m? - Destructive: 2t=m?+1/2?
T=2pvl/g
Efficiency of a Heat Engine

6. A1V1 = A2V2
Continuity
Flux (in webers)=Bcos?A
V=constant - Q=added - C=added
P=F/A=rho(g)h

7. Hookes law
F=kx
Kavg=(3/2)kbT
E=-N Change in flux/?t=Blv (v=velocity of the wire)
F=Gm1m2/r²

8. Capacitance
Centripetal Acceleration
V=?f
counterclockwise
Q=CV

9. Kirchhoffs loop rule [conservation of energy]
T=2pvl/g
sum of voltages must be zero
W=Fd=mad - direction of force must be same as direction of distance
Centripetal Acceleration

10. On a banked curve in circular motion - Fn in the x is
Fny=FnCos?
Fnx=FnSin?
Vf=Vi+ at - Vf²=Vi² +2ad - d=1/2 a t² +vit
V=(331 +.6T) T=temp in Celsius

11. Total internal reflection
?U=Q + W - heat added= heat + work
Average Speed of each Molecule
F=BIL
n1sin?1=n2sin90

12. Natural frequency open tube/not in a tub
V=?f
L=n/2?
Constructive: 2t=m?+1/2? - Destructive: 2t=m?
Kinematic with Displacement - Velocity - Acceleration - and Time

13. Period for a pendulum in simple harmonic motion
T=2pvl/g
V=?f
P=Patm + rho g h
L=n/4? has to be odd numbers

14. P = F/A
?L=(coefficient of linear expansion)aLinitial?T
General Pressure
Momentum
F=kQ1Q2/r² BREAK INTO VECTORS

15. Momentum
P=mv (Kg m/s) or (N s)
PV=nRT - PV=N (# of molecules)kb (bozons constant)T
Sum of all currents (I) entering=sum of all currents (I) leaving
P=Patm + rho g h

16. Flux
1/2QV=U
Momentum
Flux (in webers)=Bcos?A
I=?q/?t

17. P(avg) = W/?t
A1V1=A2V2
V=W/Q=KQ/r NO VECTORS
Power from Energy
Momentum

18. vrms (2 equations)
Fx=mv²/r=FnSin?
v3kT/m [mass per molecule] - v3RT/M [molar mass]
F=ma
?L=(coefficient of linear expansion)aLinitial?T

19. Force on a current carrying wire in a magnetic field
Fgx=FgCos?
F=BIL
T=2pvm/k
moment arm - perpendicular distance from the force to the axis of rotation

20. Ammeter
Q=CV
Fx=mv²/r=FnSin?
in series - measures current - low resistance
P=IV

21. Simple density formula
V=IR
V=(331 +.6T) T=temp in Celsius
Kavg=(3/2)kbT
rho=m/v

22. Voltage (circuts)
thumb in direction of proton - fingers in direction of magnetic field and palm will show you force
Sum of all currents (I) entering=sum of all currents (I) leaving
QH=QL +W and e=W/QH
V=IR

23. Net work
T=2pvm/k
Fy=FnCos?-Fg
W=KEf-KEi
Fgx=FgCos?

24. Voltage-parallel plates
a=v²/r
V=Ed
F=Bvsin?q
Temperature is constant - ?U=0 - -Q=W

25. Voltage across a battery terminal
Vab=Rated voltage-IR (r=internal resistance)
Fnx=FnSin?
V=(331 +.6T) T=temp in Celsius
L=n/4? has to be odd numbers

26. Energy in a capacitor
F=kx
Continuity
V=added - I=constant - R= added
1/2QV=U

27. torque
t=Fr - force must be perpendicular to the moment arm and the axis of rotation
Pressure is constant ?P=0 w=-P?V
P=IV
Average Speed of each Molecule

28. Impulse
V=constant - Q=added - C=added
J=?vm=F?t
PV=nRT - PV=N (# of molecules)kb (bozons constant)T
Fy=FnCos?-Fg

29. Pascals principle
T=2pvm/k
Pin=Pout=Fin/Ain=Fout/Aout
Ft=0
P=mv (Kg m/s) or (N s)

30. Simple harmonic motion - spring
T=2pvm/k
KE=1/2mv²
V=added - Q=constant - C= 1/C
f=mv²/r

31. On an inclined plane - gravity in the x
Fgx=FgCos?
Force of Spring
Kinematic with Displacement - Velocity - Acceleration - and Time
shows magnetic field created by a current. Thumb in direction of the current - fingers show direction of field

32. H = (kA?T)/L
Thermal Conductivity
1ev=1.6E-19J
Constructive: 2t=m? - Destructive: 2t=m?+1/2?
Efficiency of a Heat Engine

33. Banked curve - sum of the forces in the x
T=2pr/v
Fx=mv²/r=FnSin?
f=mv²/r
Power from Force

34. Basic thermo equation
Average Molecular Kinetic Energy
?U=Q + W - heat added= heat + work
QH=QL +W and e=W/QH
V=added - Q=constant - C= 1/C

35. K = ½mv²
Kinetic Energy
W=KEf-KEi
Spring Potential Energy
counterclockwise

36. Centripetal force
V=IR
T=2pvl/g
?L=(coefficient of linear expansion)aLinitial?T
f=mv²/r

37. F-NF or vice versa
Constructive: 2t=m?+1/2? - Destructive: 2t=m?
Ft=0
v3kT/m [mass per molecule] - v3RT/M [molar mass]
Force of Gravity

38. Energy of gravitational attraction
Fy=FnCos?-Fg
on a solenoid wrap finger around direction of current - thumb will point in north pole direction
Ug= Gm1m2/r
T=2pr/v

39. Capacitors in series
V=added - Q=constant - C= 1/C
?L=(coefficient of linear expansion)aLinitial?T
V=IR
E=F/q (point charge)=KQ1/r² BREAK INTO VECTORS

40. On an inclined plane - gravity in the y
Fgy=FgSin?
a=v²/r
Archimedes Principle/Bouyancy
Temperature is constant - ?U=0 - -Q=W

41. Potential energy
P=Patm + rho g h
F=ma
PE=mgh
V=?f

42. x = x0 + v0t + ½at²
Kinematic with Displacement - Velocity - Acceleration - and Time
Force of Spring
Gravitational Potential Energy Anywhere
W=Fd=mad - direction of force must be same as direction of distance

43. Voltage-charges formula (2)
V=W/Q=KQ/r NO VECTORS
T=2pvm/k
F=ma
Vab=Rated voltage-IR (r=internal resistance)

44. Continuity equation [Conservation of mass]
Fnet=Fb-Fg
V=Ed
Archimedes Principle/Bouyancy
A1V1=A2V2

45. U(gravitational) = -(Gm1m2/r)
Sum of all currents (I) entering=sum of all currents (I) leaving
?P=rho(g)?h
a=v²/r
Gravitational Potential Energy Anywhere

46. Force on a charged particle in a magnetic field
W is positive when work is done on the system - compression - W is negative when work is done by the system - expansion
on a solenoid wrap finger around direction of current - thumb will point in north pole direction
F=Bvsin?q
Thermal Conductivity

47. Current
Fgy=FgSin?
Work
PV=nRT - PV=N (# of molecules)kb (bozons constant)T
I=?q/?t

48. Bernoulli's Equation [Conservation of energy]
P1atm + 1/2rhoV1² + rhogh= P2atm + 1/2rhoV2² + rhogh
q=K?AT/L
Vab=Rated voltage-IR (r=internal resistance)
1ev=1.6E-19J

49. Vsound
P=IV
W=KEf-KEi
F=BIL
V=(331 +.6T) T=temp in Celsius

50. 2nd right hand rule
V=(331 +.6T) T=temp in Celsius
SG=rho object/10³
on a solenoid wrap finger around direction of current - thumb will point in north pole direction
Vab=Rated voltage-IR (r=internal resistance)