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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. Parallel Circuits
Work
t=Fr - force must be perpendicular to the moment arm and the axis of rotation
Archimedes Principle/Bouyancy
V=constant - I=added - R=1/r added

2. Total internal reflection
P=F/A=rho(g)h
?U=W - no heat added system (Q=0)
Flux (in webers)=Bcos?A
n1sin?1=n2sin90

3. Centripetal force
moment arm - perpendicular distance from the force to the axis of rotation
T=2pr/v
f=mv²/r
L=n/4? has to be odd numbers

4. Average kinetic energy
V=?f
C=KepA/d
QH=QL +W and e=W/QH
Kavg=(3/2)kbT

5. Isovolumetric/isochoric
?v=0 - w=0 area under the curve is zero
Bernoulli Principal
Spring Potential Energy
Kinematic with Velocity - Acceleration - and Displacement

6. On an inclined plane - gravity in the x
shows magnetic field created by a current. Thumb in direction of the current - fingers show direction of field
T=2pvm/k
Period in General
Fgx=FgCos?

7. 1st right hand rule
Pressure is constant ?P=0 w=-P?V
Constructive: 2t=m?+1/2? - Destructive: 2t=m?
shows magnetic field created by a current. Thumb in direction of the current - fingers show direction of field
P=IV

8. PV = nRT = NkT
Ideal Gas Law
Force of Friction
Force of Gravity
Flux (in webers)=Bcos?A

9. The three kinematics equations
Vf=Vi+ at - Vf²=Vi² +2ad - d=1/2 a t² +vit
Pin=Pout=Fin/Ain=Fout/Aout
on a solenoid wrap finger around direction of current - thumb will point in north pole direction
Average Speed of each Molecule

10. Voltage-charges formula (2)
V=W/Q=KQ/r NO VECTORS
Centripetal Acceleration
E=F/q (point charge)=KQ1/r² BREAK INTO VECTORS
Archimedes Principle/Bouyancy

11. Critical speed is
?U=Q + W - heat added= heat + work
Ft=0
V=constant - I=added - R=1/r added
Kavg=(3/2)kbT

12. 2nd right hand rule
on a solenoid wrap finger around direction of current - thumb will point in north pole direction
P=Patm + rho g h
Vf=Vi+ at - Vf²=Vi² +2ad - d=1/2 a t² +vit
Fnet=Fb-Fg

13. Period for circular motion
Efficiency of a Heat Engine
Fx=mv²/r=FnSin?
P1atm + 1/2rhoV1² + rhogh= P2atm + 1/2rhoV2² + rhogh
T=2pr/v

14. Work - simple formula
Pressure is constant ?P=0 w=-P?V
R=rho L/A A=cross sectional area
W=Fd=mad - direction of force must be same as direction of distance
Average Speed of each Molecule

15. Resistivity in a wire
Flux (in webers)=Bcos?A
?U=W - no heat added system (Q=0)
R=rho L/A A=cross sectional area
Momentum

16. Vsound
px and py are conserved
I=?q/?t
V=added - Q=constant - C= 1/C
V=(331 +.6T) T=temp in Celsius

17. Standard pressure and temperature and pressure
R=rho L/A A=cross sectional area
PV=nRT - PV=N (# of molecules)kb (bozons constant)T
?U=W - no heat added system (Q=0)
273K and 1.013E5 pa

18. Velocity of sound in a strong
V=vFt/(m/l)
Ug= Gm1m2/r
Work
Fy=FnCos?-Fg

19. Banked curve - sum of the forces in the y
Fy=FnCos?-Fg
Gravitational Potential Energy Anywhere
Adiabatic and isothermal processes ec= TH-TL/
Ft=0

20. Electron volts
1ev=1.6E-19J
Fnet=Fb-Fg
moment arm - perpendicular distance from the force to the axis of rotation
F=ma

21. Simple harmonic motion - spring
L=n/2?
T=2pvm/k
Archimedes Principle/Bouyancy
added in parallel - measures volts - high resistance

22. Pascals principle
added in parallel - measures volts - high resistance
Pin=Pout=Fin/Ain=Fout/Aout
Adiabatic and isothermal processes ec= TH-TL/
T=2pvl/g

23. Dialectrics insulating sheet between plates
Ft=0
P1atm + 1/2rhoV1² + rhogh= P2atm + 1/2rhoV2² + rhogh
C=KepA/d
T=2pr/v

24. F-F or NF-NF
Work
?U=Q + W - heat added= heat + work
Constructive: 2t=m? - Destructive: 2t=m?+1/2?
W=KEf-KEi

25. p = mv
T=2pvm/k
F=kQ1Q2/r² BREAK INTO VECTORS
Momentum
QH=QL +W and e=W/QH

26. Specific gravity
Power from Force
in series - measures current - low resistance
T=2pvl/g
SG=rho object/10³

27. Period for a spring in simple harmonic motion
J=?vm=F?t
T=2pvm/k
V=added - I=constant - R= added
rho=m/v

28. Carnot engine
Adiabatic and isothermal processes ec= TH-TL/
billiard balls - no sticking total energy is conserved
Kinematic with Displacement - Velocity - Acceleration - and Time
Spring Potential Energy

29. e = abs(W/Q)
t=Fr - force must be perpendicular to the moment arm and the axis of rotation
V=IR
KE=1/2mv²
Efficiency of a Heat Engine

30. P = P0 + pgh
Pressure from Depth
F=BIL
Force of Spring
moment arm - perpendicular distance from the force to the axis of rotation

31. Ideal gas laws
V=constant - I=added - R=1/r added
thumb in direction of proton - fingers in direction of magnetic field and palm will show you force
Pressure from Depth
PV=nRT - PV=N (# of molecules)kb (bozons constant)T

32. Net work
PE=1/2kx²
T=2pvm/k
W=KEf-KEi
n1sin?1=n2sin90

33. EMF (two formulas)
on a solenoid wrap finger around direction of current - thumb will point in north pole direction
E=-N Change in flux/?t=Blv (v=velocity of the wire)
in series - measures current - low resistance
Continuity

34. F(buoy) = pVg
Archimedes Principle/Bouyancy
Force of Gravity
Pressure from Depth
Fb=mf g= rhof Vf g

35. Power - simple formula (mechanics)
F=Gm1m2/r²
P=W/T=FD/T=FV
Vf=Vi+ at - Vf²=Vi² +2ad - d=1/2 a t² +vit
L=n/2?

36. Continuity equation [Conservation of mass]
V=vFt/(m/l)
A1V1=A2V2
Work
f=mv²/r

37. Natural frequency open tube/not in a tub
L=n/2?
?U=W - no heat added system (Q=0)
F=kx
Thermal Conductivity

38. U(spring) = ½kx²
Constructive: 2t=m?+1/2? - Destructive: 2t=m?
Spring Potential Energy
added in parallel - measures volts - high resistance
Archimedes Principle/Bouyancy

39. Potential energy
Vab=Rated voltage-IR (r=internal resistance)
R=rho L/A A=cross sectional area
PE=mgh
P=mv (Kg m/s) or (N s)

40. Elastic collision
Fnet=Fb-Fg
a=v²/r
billiard balls - no sticking total energy is conserved
V=IR

41. Magnitude of gravitational forces between objects
V=added - I=constant - R= added
Sum of all currents (I) entering=sum of all currents (I) leaving
T=2pvl/g
F=Gm1m2/r²

42. U(gravitational) = -(Gm1m2/r)
added in parallel - measures volts - high resistance
F=ma
PE=mgh
Gravitational Potential Energy Anywhere

43. K = (3/2)kT
Spring Potential Energy
Average Speed of each Molecule
shows magnetic field created by a current. Thumb in direction of the current - fingers show direction of field
Average Molecular Kinetic Energy

44. Capacitors in parallel
P=Patm + rho g h
Force of Spring
Adiabatic and isothermal processes ec= TH-TL/
V=constant - Q=added - C=added

45. v² = v0² + 2a(x-x0)
PE=mgh
T=2pr/v
Kinematic with Velocity - Acceleration - and Displacement
V=constant - Q=added - C=added

46. K = ½mv²
in series - measures current - low resistance
Fy=FnCos?-Fg
P1atm + 1/2rhoV1² + rhogh= P2atm + 1/2rhoV2² + rhogh
Kinetic Energy

47. Energy of gravitational attraction
Centripetal Acceleration
Ug= Gm1m2/r
q=K?AT/L
PE=1/2kx²

48. Kirchhoffs Junction rule
Centripetal Acceleration
Sum of all currents (I) entering=sum of all currents (I) leaving
Work
Fy=FnCos?-Fg

49. Capacitors in series
V=added - Q=constant - C= 1/C
V=IR
Fy=FnCos?-Fg
1ev=1.6E-19J

50. Force on a current carrying wire in a magnetic field
F=BIL
V=W/Q=KQ/r NO VECTORS
V=constant - Q=added - C=added
Period in General