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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. Kirchhoffs loop rule [conservation of energy]
Ideal Gas Law
Force of Friction
Fgy=FgSin?
sum of voltages must be zero

2. Average kinetic energy
Kinematic with Displacement - Velocity - Acceleration - and Time
Kavg=(3/2)kbT
F=ma
PE=1/2kx²

3. Period for a pendulum in simple harmonic motion
a=v²/r
1/2QV=U
T=2pvl/g
PE=1/2kx²

4. EMF (two formulas)
F=ma
P=mv (Kg m/s) or (N s)
E=-N Change in flux/?t=Blv (v=velocity of the wire)
thumb in direction of proton - fingers in direction of magnetic field and palm will show you force

5. v² = v0² + 2a(x-x0)
Kinematic with Velocity - Acceleration - and Displacement
n1sin?1=n2sin90
Gravitational Potential Energy Anywhere
t=Fr - force must be perpendicular to the moment arm and the axis of rotation

6. Banked curve - sum of the forces in the y
P=mv (Kg m/s) or (N s)
Fy=FnCos?-Fg
Kavg=(3/2)kbT
P1atm + 1/2rhoV1² + rhogh= P2atm + 1/2rhoV2² + rhogh

7. Banked curve - sum of the forces in the x
Fny=FnCos?
T=2pvm/k
F=Bvsin?q
Fx=mv²/r=FnSin?

8. x = x0 + v0t + ½at²
Kinematic with Velocity - Acceleration - and Time
J=?vm=F?t
Kinematic with Displacement - Velocity - Acceleration - and Time
Average Molecular Kinetic Energy

9. On a banked curve in circular motion - Fn in the y is
Fny=FnCos?
V=vFt/(m/l)
Pressure from Depth
Continuity

10. Voltage-parallel plates
Fy=FnCos?-Fg
Vf=Vi+ at - Vf²=Vi² +2ad - d=1/2 a t² +vit
V=Ed
Gravitational Potential Energy Anywhere

11. Magnitude of gravitational forces between objects
Fnet=rhofluid vfluid g -rho object vobject g where the volumes are usually equal
Force of Friction
?P=rho(g)?h
F=Gm1m2/r²

12. A1V1 = A2V2
Fnx=FnSin?
V=added - Q=constant - C= 1/C
Continuity
Period in General

13. Carnot engine
PE=1/2kx²
F=Gm1m2/r²
KE=1/2mv²
Adiabatic and isothermal processes ec= TH-TL/

14. vrms (2 equations)
Work
T=2pvm/k
v3kT/m [mass per molecule] - v3RT/M [molar mass]
1ev=1.6E-19J

15. PE of a spring
PE=1/2kx²
v3kT/m [mass per molecule] - v3RT/M [molar mass]
Ideal Gas Law
Vab=Rated voltage-IR (r=internal resistance)

16. On a banked curve in circular motion - Fn in the x is
V=added - I=constant - R= added
Fnx=FnSin?
F=BIL
V=vFt/(m/l)

17. Kinetic energy
Power from Force
V=(331 +.6T) T=temp in Celsius
KE=1/2mv²
V=vFt/(m/l)

18. torque
Force of Friction
t=Fr - force must be perpendicular to the moment arm and the axis of rotation
added in parallel - measures volts - high resistance
V=added - Q=constant - C= 1/C

19. Continuity equation [Conservation of mass]
?U=Q + W - heat added= heat + work
A1V1=A2V2
Fx=mv²/r=FnSin?
px and py are conserved

20. 1st right hand rule
Force of Spring
Adiabatic and isothermal processes ec= TH-TL/
shows magnetic field created by a current. Thumb in direction of the current - fingers show direction of field
Fgx=FgCos?

21. r in torque
T=2pvm/k
moment arm - perpendicular distance from the force to the axis of rotation
Centripetal Acceleration
sum of voltages must be zero

22. U(spring) = ½kx²
Spring Potential Energy
Fb=mf g= rhof Vf g
q=K?AT/L
F=ma

23. Thermal expansion
General Pressure
?L=(coefficient of linear expansion)aLinitial?T
?U=Q + W - heat added= heat + work
Spring Potential Energy

24. Vectors in momentum
px and py are conserved
P=IV
E=-N Change in flux/?t=Blv (v=velocity of the wire)
Efficiency of a Heat Engine

25. Voltage across a battery terminal
C=KepA/d
Vab=Rated voltage-IR (r=internal resistance)
Adiabatic and isothermal processes ec= TH-TL/
E=F/q (point charge)=KQ1/r² BREAK INTO VECTORS

26. Velocity of a wave
Momentum
QH=QL +W and e=W/QH
V=?f
J=?vm=F?t

27. P = Fvcos?
Kinematic with Velocity - Acceleration - and Time
V=added - I=constant - R= added
Power from Force
Gravitational Potential Energy Anywhere

28. Isobaric process
Power from Energy
Pressure is constant ?P=0 w=-P?V
?v=0 - w=0 area under the curve is zero
V=constant - Q=added - C=added

29. Velocity of sound in a strong
V=vFt/(m/l)
Fb=mf g= rhof Vf g
t=Fr - force must be perpendicular to the moment arm and the axis of rotation
Sum of all currents (I) entering=sum of all currents (I) leaving

30. W
Fgy=FgSin?
Force of Gravity
F=kx
W is positive when work is done on the system - compression - W is negative when work is done by the system - expansion

31. Series Circuits
V=added - I=constant - R= added
Kinetic Energy
Efficiency of an Ideal Engine
Bernoulli Principal

32. a(centripetal) = v²/r
Centripetal Acceleration
Flux (in webers)=Bcos?A
General Pressure
?L=(coefficient of linear expansion)aLinitial?T

33. p = mv
Adiabatic and isothermal processes ec= TH-TL/
Momentum
W is positive when work is done on the system - compression - W is negative when work is done by the system - expansion
PE=mgh

34. Flux
V=constant - I=added - R=1/r added
1ev=1.6E-19J
Force of Friction
Flux (in webers)=Bcos?A

35. Elastic collision
Force of Friction
?U=Q + W - heat added= heat + work
billiard balls - no sticking total energy is conserved
P=IV

36. Voltage-charges formula (2)
W=Fd=mad - direction of force must be same as direction of distance
Continuity
V=W/Q=KQ/r NO VECTORS
?U=W - no heat added system (Q=0)

37. Work - simple formula
Spring Potential Energy
P1atm + 1/2rhoV1² + rhogh= P2atm + 1/2rhoV2² + rhogh
J=?vm=F?t
W=Fd=mad - direction of force must be same as direction of distance

38. Kirchhoffs Junction rule
V=constant - Q=added - C=added
Sum of all currents (I) entering=sum of all currents (I) leaving
Average Molecular Kinetic Energy
J=?vm=F?t

39. Ideal gas laws
?L=(coefficient of linear expansion)aLinitial?T
Kinetic Energy
V=IR
PV=nRT - PV=N (# of molecules)kb (bozons constant)T

40. F-F or NF-NF
V=vFt/(m/l)
?P=rho(g)?h
Constructive: 2t=m? - Destructive: 2t=m?+1/2?
T=2pvl/g

41. Pascals principle
Pin=Pout=Fin/Ain=Fout/Aout
billiard balls - no sticking total energy is conserved
Kinematic with Displacement - Velocity - Acceleration - and Time
Bernoulli Principal

42. Capacitors in series
L=n/4? has to be odd numbers
V=added - Q=constant - C= 1/C
counterclockwise
V=W/Q=KQ/r NO VECTORS

43. Hookes law
in series - measures current - low resistance
Period in General
F=kx
C=KepA/d

44. Force buoyancy (2 formulas)
moment arm - perpendicular distance from the force to the axis of rotation
E=-N Change in flux/?t=Blv (v=velocity of the wire)
Fb=mf g= rhof Vf g
in series - measures current - low resistance

45. Impulse
billiard balls - no sticking total energy is conserved
J=?vm=F?t
SG=rho object/10³
?U=Q + W - heat added= heat + work

46. 2nd right hand rule
on a solenoid wrap finger around direction of current - thumb will point in north pole direction
?U=Q + W - heat added= heat + work
P=mv (Kg m/s) or (N s)
?L=(coefficient of linear expansion)aLinitial?T

47. F(gravity) = -(Gm1m2/r²)
Spring Potential Energy
PE=1/2kx²
?U=Q + W - heat added= heat + work
Force of Gravity

48. Force on a charged particle in a magnetic field
F=Bvsin?q
Fb=mf g= rhof Vf g
PV=nRT - PV=N (# of molecules)kb (bozons constant)T
?v=0 - w=0 area under the curve is zero

49. Dialectrics insulating sheet between plates
Average Molecular Kinetic Energy
?v=0 - w=0 area under the curve is zero
V=constant - I=added - R=1/r added
C=KepA/d

50. Force on a current carrying wire in a magnetic field
Kinematic with Velocity - Acceleration - and Time
F=BIL
P=F/A=rho(g)h
Flux (in webers)=Bcos?A