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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. On a banked curve in circular motion - Fn in the x is
QH=QL +W and e=W/QH
Ft=0
Fnx=FnSin?
Gravitational Potential Energy Anywhere

2. U(spring) = ½kx²
Spring Potential Energy
P1atm + 1/2rhoV1² + rhogh= P2atm + 1/2rhoV2² + rhogh
Efficiency of an Ideal Engine
Gravitational Potential Energy Anywhere

3. Voltage-parallel plates
F=kx
rho=m/v
V=Ed
Force of Spring

4. Adiabatic process
Temperature is constant - ?U=0 - -Q=W
R=rho L/A A=cross sectional area
?U=W - no heat added system (Q=0)
clockwise

5. Net force/apparent weight in forces
Ideal Gas Law
Constructive: 2t=m?+1/2? - Destructive: 2t=m?
Fnet=Fb-Fg
T=2pvm/k

6. Hookes law
J=?vm=F?t
V=added - Q=constant - C= 1/C
Constructive: 2t=m? - Destructive: 2t=m?+1/2?
F=kx

7. Basic thermo equation
Fy=FnCos?-Fg
Sum of all currents (I) entering=sum of all currents (I) leaving
?U=Q + W - heat added= heat + work
Force of Spring

8. Electron volts
Vf=Vi+ at - Vf²=Vi² +2ad - d=1/2 a t² +vit
F=Bvsin?q
Spring Potential Energy
1ev=1.6E-19J

9. vrms (2 equations)
f=mv²/r
Ug= Gm1m2/r
Q=CV
v3kT/m [mass per molecule] - v3RT/M [molar mass]

10. Banked curve - sum of the forces in the y
Fy=FnCos?-Fg
Ideal Gas Law
V=added - Q=constant - C= 1/C
Power from Force

11. Net force/apparent weight broken done
PE=mgh
F=Gm1m2/r²
Power from Force
Fnet=rhofluid vfluid g -rho object vobject g where the volumes are usually equal

12. Magnitude of gravitational forces between objects
n1sin?1=n2sin90
on a solenoid wrap finger around direction of current - thumb will point in north pole direction
F=Gm1m2/r²
Gravitational Potential Energy Anywhere

13. PV = nRT = NkT
Ideal Gas Law
Fnx=FnSin?
V=W/Q=KQ/r NO VECTORS
Temperature is constant - ?U=0 - -Q=W

14. Positive torque
Force of Friction
counterclockwise
Q=CV
I=?q/?t

15. P = F/A
F=Bvsin?q
General Pressure
Constructive: 2t=m?+1/2? - Destructive: 2t=m?
V=IR

16. Average kinetic energy
Force of Friction
Fnet=rhofluid vfluid g -rho object vobject g where the volumes are usually equal
Adiabatic and isothermal processes ec= TH-TL/
Kavg=(3/2)kbT

17. a(centripetal) = v²/r
?L=(coefficient of linear expansion)aLinitial?T
Fx=mv²/r=FnSin?
in series - measures current - low resistance
Centripetal Acceleration

18. Centripetal force
?U=Q + W - heat added= heat + work
PE=mgh
?L=(coefficient of linear expansion)aLinitial?T
f=mv²/r

19. Voltage across a battery terminal
Average Speed of each Molecule
Ft=0
1ev=1.6E-19J
Vab=Rated voltage-IR (r=internal resistance)

20. W
W is positive when work is done on the system - compression - W is negative when work is done by the system - expansion
A1V1=A2V2
T=2pvm/k
Pin=Pout=Fin/Ain=Fout/Aout

21. snells law
rho=m/v
273K and 1.013E5 pa
W=Fd=mad - direction of force must be same as direction of distance
n1sin?1=n2sin?2

22. Bernoulli's Equation [Conservation of energy]
f=mv²/r
Sum of all currents (I) entering=sum of all currents (I) leaving
P1atm + 1/2rhoV1² + rhogh= P2atm + 1/2rhoV2² + rhogh
Kinematic with Velocity - Acceleration - and Time

23. Vsound
clockwise
P=IV
Pressure from Depth
V=(331 +.6T) T=temp in Celsius

24. Resistivity in a wire
V=constant - Q=added - C=added
?v=0 - w=0 area under the curve is zero
R=rho L/A A=cross sectional area
F=kQ1Q2/r² BREAK INTO VECTORS

25. Series Circuits
Fny=FnCos?
W=Fd=mad - direction of force must be same as direction of distance
counterclockwise
V=added - I=constant - R= added

26. F(buoy) = pVg
Archimedes Principle/Bouyancy
thumb in direction of proton - fingers in direction of magnetic field and palm will show you force
W=Fd=mad - direction of force must be same as direction of distance
V=W/Q=KQ/r NO VECTORS

27. Capacitors in parallel
Kinematic with Velocity - Acceleration - and Displacement
T=2pvm/k
V=constant - Q=added - C=added
Fgy=FgSin?

28. H = (kA?T)/L
Thermal Conductivity
Fy=FnCos?-Fg
Ug= Gm1m2/r
PV=nRT - PV=N (# of molecules)kb (bozons constant)T

29. Kirchhoffs loop rule [conservation of energy]
W=Fd=mad - direction of force must be same as direction of distance
sum of voltages must be zero
Continuity
F=Bvsin?q

30. Power - simple formula (mechanics)
V=added - Q=constant - C= 1/C
?U=W - no heat added system (Q=0)
Power from Force
P=W/T=FD/T=FV

31. Potential energy
Thermal Conductivity
V=W/Q=KQ/r NO VECTORS
Ideal Gas Law
PE=mgh

32. Voltmeter
P=mv (Kg m/s) or (N s)
added in parallel - measures volts - high resistance
Period in General
Sum of all currents (I) entering=sum of all currents (I) leaving

33. v = v0 + at
Bernoulli Principal
F=ma
Kinematic with Velocity - Acceleration - and Time
PV=nRT - PV=N (# of molecules)kb (bozons constant)T

34. K = (3/2)kT
Average Molecular Kinetic Energy
Ft=0
L=n/2?
a=v²/r

35. heat flow through a window or door
V=added - I=constant - R= added
billiard balls - no sticking total energy is conserved
q=K?AT/L
Fgx=FgCos?

36. Power (circuts)
px and py are conserved
T=2pvm/k
T=2pvl/g
P=IV

37. Force on a current carrying wire in a magnetic field
R=rho L/A A=cross sectional area
F=BIL
f=mv²/r
L=n/4? has to be odd numbers

38. F(spring) = -kx
T=2pvm/k
counterclockwise
billiard balls - no sticking total energy is conserved
Force of Spring

39. Kirchhoffs Junction rule
Sum of all currents (I) entering=sum of all currents (I) leaving
T=2pvm/k
Flux (in webers)=Bcos?A
Archimedes Principle/Bouyancy

40. F(gravity) = -(Gm1m2/r²)
Vf=Vi+ at - Vf²=Vi² +2ad - d=1/2 a t² +vit
P=W/T=FD/T=FV
F=Bvsin?q
Force of Gravity

41. P + pgy + ½pv² = const.
L=n/4? has to be odd numbers
Bernoulli Principal
Gravitational Potential Energy Anywhere
Ideal Gas Law

42. Electric field intensity
E=F/q (point charge)=KQ1/r² BREAK INTO VECTORS
px and py are conserved
R=rho L/A A=cross sectional area
1ev=1.6E-19J

43. Work - simple formula
P=F/A=rho(g)h
E=F/q (point charge)=KQ1/r² BREAK INTO VECTORS
?v=0 - w=0 area under the curve is zero
W=Fd=mad - direction of force must be same as direction of distance

44. Simple force equation
P=mv (Kg m/s) or (N s)
F=ma
rho=m/v
Average Speed of each Molecule

45. natural frequencies in a closed tube
P=mv (Kg m/s) or (N s)
L=n/4? has to be odd numbers
Vf=Vi+ at - Vf²=Vi² +2ad - d=1/2 a t² +vit
Work

46. F-F or NF-NF
Constructive: 2t=m? - Destructive: 2t=m?+1/2?
Kavg=(3/2)kbT
Ideal Gas Law
Vab=Rated voltage-IR (r=internal resistance)

47. P(avg) = W/?t
F=BIL
?U=Q + W - heat added= heat + work
W is positive when work is done on the system - compression - W is negative when work is done by the system - expansion
Power from Energy

48. Voltage (circuts)
W=KEf-KEi
V=IR
V=W/Q=KQ/r NO VECTORS
Kavg=(3/2)kbT

49. Couloms law (force between two charged objects)
Gravitational Potential Energy Anywhere
W=KEf-KEi
thumb in direction of proton - fingers in direction of magnetic field and palm will show you force
F=kQ1Q2/r² BREAK INTO VECTORS

50. Continuity equation [Conservation of mass]
T=2pr/v
Pressure is constant ?P=0 w=-P?V
A1V1=A2V2
Fnx=FnSin?