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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. Period for circular motion
T=2pvl/g
T=2pr/v
n1sin?1=n2sin?2
V=?f

2. PV = nRT = NkT
rho=m/v
Ideal Gas Law
Pressure is constant ?P=0 w=-P?V
F=Bvsin?q

3. Momentum
P=mv (Kg m/s) or (N s)
Fb=mf g= rhof Vf g
on a solenoid wrap finger around direction of current - thumb will point in north pole direction
counterclockwise

4. v = v0 + at
W=KEf-KEi
Kinematic with Velocity - Acceleration - and Time
F=Gm1m2/r²
q=K?AT/L

5. Centripetal force
F=Bvsin?q
?U=W - no heat added system (Q=0)
f=mv²/r
Thermal Conductivity

6. P + pgy + ½pv² = const.
Bernoulli Principal
Work
Adiabatic and isothermal processes ec= TH-TL/
counterclockwise

7. Energy in a capacitor
1/2QV=U
clockwise
Constructive: 2t=m?+1/2? - Destructive: 2t=m?
C=KepA/d

8. Thermal expansion
Spring Potential Energy
Force of Gravity
F=BIL
?L=(coefficient of linear expansion)aLinitial?T

9. Net force/apparent weight in forces
Period in General
W=Fd=mad - direction of force must be same as direction of distance
Fnet=Fb-Fg
V=added - Q=constant - C= 1/C

10. Series Circuits
Fgy=FgSin?
Momentum
V=added - I=constant - R= added
n1sin?1=n2sin?2

11. p = mv
A1V1=A2V2
Momentum
added in parallel - measures volts - high resistance
R=rho L/A A=cross sectional area

12. Specific gravity
Flux (in webers)=Bcos?A
Fgy=FgSin?
px and py are conserved
SG=rho object/10³

13. Adiabatic process
Q=CV
Centripetal Acceleration
F=Bvsin?q
?U=W - no heat added system (Q=0)

14. F(buoy) = pVg
Sum of all currents (I) entering=sum of all currents (I) leaving
P1atm + 1/2rhoV1² + rhogh= P2atm + 1/2rhoV2² + rhogh
Pressure from Depth
Archimedes Principle/Bouyancy

15. Force buoyancy (2 formulas)
V=constant - Q=added - C=added
P=F/A=rho(g)h
Fb=mf g= rhof Vf g
Work

16. 2nd right hand rule
Kinematic with Velocity - Acceleration - and Time
L=n/2?
T=2pvl/g
on a solenoid wrap finger around direction of current - thumb will point in north pole direction

17. Net force/apparent weight broken done
Thermal Conductivity
V=(331 +.6T) T=temp in Celsius
clockwise
Fnet=rhofluid vfluid g -rho object vobject g where the volumes are usually equal

18. Basic thermo equation
n1sin?1=n2sin90
P=mv (Kg m/s) or (N s)
?U=Q + W - heat added= heat + work
Force of Spring

19. e = abs(W/Q)
Efficiency of a Heat Engine
Q=CV
273K and 1.013E5 pa
Fgy=FgSin?

20. vrms (2 equations)
Kinematic with Displacement - Velocity - Acceleration - and Time
v3kT/m [mass per molecule] - v3RT/M [molar mass]
Q=CV
Fnx=FnSin?

21. Engines (2 equations)
Fnx=FnSin?
rho=m/v
QH=QL +W and e=W/QH
T=2pvl/g

22. Kirchhoffs Junction rule
F=BIL
P=IV
Sum of all currents (I) entering=sum of all currents (I) leaving
P=F/A=rho(g)h

23. P = Fvcos?
Power from Force
C=KepA/d
Ug= Gm1m2/r
V=?f

24. Voltage (circuts)
Pressure is constant ?P=0 w=-P?V
F=Bvsin?q
A1V1=A2V2
V=IR

25. P = F/A
R=rho L/A A=cross sectional area
General Pressure
W is positive when work is done on the system - compression - W is negative when work is done by the system - expansion
Work

26. Kinetic energy
Fnx=FnSin?
Pressure is constant ?P=0 w=-P?V
Kinetic Energy
KE=1/2mv²

27. F-NF or vice versa
Constructive: 2t=m?+1/2? - Destructive: 2t=m?
PE=1/2kx²
V=W/Q=KQ/r NO VECTORS
?U=W - no heat added system (Q=0)

28. Ideal gas laws
V=added - I=constant - R= added
W=KEf-KEi
PV=nRT - PV=N (# of molecules)kb (bozons constant)T
P=F/A=rho(g)h

29. Vsound
rho=m/v
Fgy=FgSin?
F=kx
V=(331 +.6T) T=temp in Celsius

30. Vectors in momentum
Fgx=FgCos?
px and py are conserved
?L=(coefficient of linear expansion)aLinitial?T
Fny=FnCos?

31. Elastic collision
Ft=0
V=vFt/(m/l)
T=2pvm/k
billiard balls - no sticking total energy is conserved

32. Isobaric process
Pressure is constant ?P=0 w=-P?V
Continuity
F=kx
Fgy=FgSin?

33. Dialectrics insulating sheet between plates
?L=(coefficient of linear expansion)aLinitial?T
P=W/T=FD/T=FV
?U=W - no heat added system (Q=0)
C=KepA/d

34. Simple harmonic motion - pendulum
P=mv (Kg m/s) or (N s)
V=added - Q=constant - C= 1/C
Fnx=FnSin?
T=2pvl/g

35. W
T=2pvm/k
Archimedes Principle/Bouyancy
Fgy=FgSin?
W is positive when work is done on the system - compression - W is negative when work is done by the system - expansion

36. Simple harmonic motion - spring
T=2pvm/k
n1sin?1=n2sin90
PV=nRT - PV=N (# of molecules)kb (bozons constant)T
V=?f

37. Simple density formula
Fy=FnCos?-Fg
in series - measures current - low resistance
n1sin?1=n2sin?2
rho=m/v

38. EMF (two formulas)
Fgx=FgCos?
Temperature is constant - ?U=0 - -Q=W
R=rho L/A A=cross sectional area
E=-N Change in flux/?t=Blv (v=velocity of the wire)

39. natural frequencies in a closed tube
Pressure from Depth
shows magnetic field created by a current. Thumb in direction of the current - fingers show direction of field
V=IR
L=n/4? has to be odd numbers

40. Impulse
Force of Spring
273K and 1.013E5 pa
clockwise
J=?vm=F?t

41. H = (kA?T)/L
Fb=mf g= rhof Vf g
V=added - I=constant - R= added
Average Molecular Kinetic Energy
Thermal Conductivity

42. v² = v0² + 2a(x-x0)
Kinetic Energy
J=?vm=F?t
?L=(coefficient of linear expansion)aLinitial?T
Kinematic with Velocity - Acceleration - and Displacement

43. Period for a spring in simple harmonic motion
PE=mgh
Fy=FnCos?-Fg
Pressure is constant ?P=0 w=-P?V
T=2pvm/k

44. r in torque
F=Bvsin?q
moment arm - perpendicular distance from the force to the axis of rotation
Fgx=FgCos?
t=Fr - force must be perpendicular to the moment arm and the axis of rotation

45. Power - simple formula (mechanics)
?U=W - no heat added system (Q=0)
P=W/T=FD/T=FV
PE=mgh
Pin=Pout=Fin/Ain=Fout/Aout

46. Voltage-parallel plates
?L=(coefficient of linear expansion)aLinitial?T
Force of Friction
Pressure is constant ?P=0 w=-P?V
V=Ed

47. Absolute pressure
P=Patm + rho g h
in series - measures current - low resistance
T=2pr/v
Constructive: 2t=m? - Destructive: 2t=m?+1/2?

48. U(spring) = ½kx²
?P=rho(g)?h
px and py are conserved
Q=CV
Spring Potential Energy

49. PE of a spring
PE=1/2kx²
V=W/Q=KQ/r NO VECTORS
V=added - Q=constant - C= 1/C
Fnx=FnSin?

50. F-F or NF-NF
F=BIL
Constructive: 2t=m? - Destructive: 2t=m?+1/2?
counterclockwise
P=F/A=rho(g)h