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AP Physics B: Formulas

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Answer 50 questions in 15 minutes.
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Match each statement with the correct term.
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1. Critical speed is
Vf=Vi+ at - Vf=Vi +2ad - d=1/2 a t +vit
P=F/A=rho(g)h
Ft=0
Kavg=(3/2)kbT

2. Carnot engine
Efficiency of an Ideal Engine
on a solenoid wrap finger around direction of current - thumb will point in north pole direction
Adiabatic and isothermal processes ec= TH-TL/
P=W/T=FD/T=FV

3. Work - simple formula
PE=1/2kx
W=Fd=mad - direction of force must be same as direction of distance
a=v/r
Force of Spring

4. Negative torque
clockwise
thumb in direction of proton - fingers in direction of magnetic field and palm will show you force
1/2QV=U
Average Molecular Kinetic Energy

5. x = x0 + v0t + at
Kinematic with Displacement - Velocity - Acceleration - and Time
Centripetal Acceleration
Average Speed of each Molecule
PE=1/2kx

6. On a banked curve in circular motion - Fn in the y is
Fny=FnCos?
sum of voltages must be zero
E=-N Change in flux/?t=Blv (v=velocity of the wire)
P1atm + 1/2rhoV1 + rhogh= P2atm + 1/2rhoV2 + rhogh

7. Centripetal acceleration
Sum of all currents (I) entering=sum of all currents (I) leaving
Flux (in webers)=Bcos?A
Spring Potential Energy
a=v/r

8. Momentum
V=constant - Q=added - C=added
?U=Q + W - heat added= heat + work
T=2pvl/g
P=mv (Kg m/s) or (N s)

9. W = F?rcos?
clockwise
Gravitational Potential Energy Anywhere
added in parallel - measures volts - high resistance
Work

10. Total internal reflection
Fny=FnCos?
thumb in direction of proton - fingers in direction of magnetic field and palm will show you force
Thermal Conductivity
n1sin?1=n2sin90

11. Net force/apparent weight in forces
T=2pvm/k
added in parallel - measures volts - high resistance
V=added - Q=constant - C= 1/C
Fnet=Fb-Fg

12. P = F/A
Thermal Conductivity
General Pressure
I=?q/?t
V=vFt/(m/l)

13. Engines (2 equations)
Efficiency of an Ideal Engine
Archimedes Principle/Bouyancy
QH=QL +W and e=W/QH
Kinematic with Displacement - Velocity - Acceleration - and Time

14. Kirchhoffs loop rule [conservation of energy]
F=kQ1Q2/r BREAK INTO VECTORS
sum of voltages must be zero
V=constant - I=added - R=1/r added
Ideal Gas Law

15. Isovolumetric/isochoric
?v=0 - w=0 area under the curve is zero
1ev=1.6E-19J
v3kT/m [mass per molecule] - v3RT/M [molar mass]
F=kx

16. Adiabatic process
?U=W - no heat added system (Q=0)
shows magnetic field created by a current. Thumb in direction of the current - fingers show direction of field
V=vFt/(m/l)
Ft=0

17. Capacitors in parallel
Kinematic with Displacement - Velocity - Acceleration - and Time
Kavg=(3/2)kbT
1ev=1.6E-19J
V=constant - Q=added - C=added

18. F(friction) = N
1ev=1.6E-19J
Force of Friction
V=W/Q=KQ/r NO VECTORS
PV=nRT - PV=N (# of molecules)kb (bozons constant)T

19. Series Circuits
Fy=FnCos?-Fg
Force of Gravity
V=added - I=constant - R= added
Work

20. F-NF or vice versa
Constructive: 2t=m?+1/2? - Destructive: 2t=m?
V=constant - I=added - R=1/r added
Kinematic with Velocity - Acceleration - and Time
n1sin?1=n2sin?2

21. v = v(3RT)/M = v(3KT)/
T=2pvl/g
Efficiency of an Ideal Engine
Average Speed of each Molecule
P1atm + 1/2rhoV1 + rhogh= P2atm + 1/2rhoV2 + rhogh

22. Power (circuts)
added in parallel - measures volts - high resistance
F=Bvsin?q
V=constant - I=added - R=1/r added
P=IV

23. Period for circular motion
T=2pr/v
R=rho L/A A=cross sectional area
W=KEf-KEi
T=2pvl/g

24. P = P0 + pgh
a=v/r
F=kQ1Q2/r BREAK INTO VECTORS
L=n/4? has to be odd numbers
Pressure from Depth

25. Impulse
on a solenoid wrap finger around direction of current - thumb will point in north pole direction
T=2pvm/k
Kinematic with Velocity - Acceleration - and Displacement
J=?vm=F?t

26. Natural frequency open tube/not in a tub
L=n/2?
Work
T=2pvm/k
J=?vm=F?t

27. K = (3/2)kT
?L=(coefficient of linear expansion)aLinitial?T
Average Molecular Kinetic Energy
?P=rho(g)?h
C=KepA/d

28. e = abs(W/Q)
Efficiency of an Ideal Engine
SG=rho object/10
F=kQ1Q2/r BREAK INTO VECTORS
Efficiency of a Heat Engine

29. Simple harmonic motion - spring
L=n/2?
Fnx=FnSin?
Constructive: 2t=m?+1/2? - Destructive: 2t=m?
T=2pvm/k

30. On a banked curve in circular motion - Fn in the x is
?P=rho(g)?h
Fnx=FnSin?
V=vFt/(m/l)
R=rho L/A A=cross sectional area

31. Net force/apparent weight broken done
f=mv/r
Fnet=rhofluid vfluid g -rho object vobject g where the volumes are usually equal
Power from Energy
PE=1/2kx

32. Electron volts
1ev=1.6E-19J
E=-N Change in flux/?t=Blv (v=velocity of the wire)
Force of Friction
V=Ed

33. P + pgy + pv = const.
C=KepA/d
Power from Force
Q=CV
Bernoulli Principal

34. Simple force equation
E=F/q (point charge)=KQ1/r BREAK INTO VECTORS
Bernoulli Principal
F=ma
v3kT/m [mass per molecule] - v3RT/M [molar mass]

35. Dialectrics insulating sheet between plates
W=KEf-KEi
F=kQ1Q2/r BREAK INTO VECTORS
C=KepA/d
in series - measures current - low resistance

36. F(spring) = -kx
273K and 1.013E5 pa
Force of Spring
F=Gm1m2/r
Fnx=FnSin?

37. p = mv
Force of Spring
Vab=Rated voltage-IR (r=internal resistance)
C=KepA/d
Momentum

38. A1V1 = A2V2
a=v/r
F=Bvsin?q
Continuity
Force of Gravity

39. P = Fvcos?
Power from Force
F=kQ1Q2/r BREAK INTO VECTORS
V=Ed
W=Fd=mad - direction of force must be same as direction of distance

40. Voltage across a battery terminal
Vab=Rated voltage-IR (r=internal resistance)
a=v/r
I=?q/?t
E=F/q (point charge)=KQ1/r BREAK INTO VECTORS

41. 2nd right hand rule
px and py are conserved
273K and 1.013E5 pa
on a solenoid wrap finger around direction of current - thumb will point in north pole direction
R=rho L/A A=cross sectional area

42. PV = nRT = NkT
Ideal Gas Law
F=kx
px and py are conserved
1ev=1.6E-19J

43. Period for a pendulum in simple harmonic motion
V=vFt/(m/l)
V=?f
Fgy=FgSin?
T=2pvl/g

44. Voltage-charges formula (2)
V=?f
V=W/Q=KQ/r NO VECTORS
W=Fd=mad - direction of force must be same as direction of distance
1/2QV=U

45. Current
Power from Force
I=?q/?t
V=added - I=constant - R= added
Kavg=(3/2)kbT

46. Vectors in momentum
Q=CV
px and py are conserved
?v=0 - w=0 area under the curve is zero
Momentum

47. torque
Continuity
t=Fr - force must be perpendicular to the moment arm and the axis of rotation
Efficiency of a Heat Engine
thumb in direction of proton - fingers in direction of magnetic field and palm will show you force

48. PE of a spring
PE=1/2kx
Vf=Vi+ at - Vf=Vi +2ad - d=1/2 a t +vit
Centripetal Acceleration
?U=W - no heat added system (Q=0)

49. Flux
Fnx=FnSin?
Continuity
Flux (in webers)=Bcos?A
Vab=Rated voltage-IR (r=internal resistance)

50. Force on a charged particle in a magnetic field
F=Bvsin?q
V=constant - I=added - R=1/r added
C=KepA/d
Vab=Rated voltage-IR (r=internal resistance)

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AP Physics B: Formulas

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