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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. Bernoulli's Equation [Conservation of energy]
Sum of all currents (I) entering=sum of all currents (I) leaving
T=2pr/v
P1atm + 1/2rhoV1² + rhogh= P2atm + 1/2rhoV2² + rhogh
V=added - Q=constant - C= 1/C

2. Centripetal acceleration
a=v²/r
Constructive: 2t=m? - Destructive: 2t=m?+1/2?
Centripetal Acceleration
?U=Q + W - heat added= heat + work

3. vrms (2 equations)
?L=(coefficient of linear expansion)aLinitial?T
Efficiency of a Heat Engine
v3kT/m [mass per molecule] - v3RT/M [molar mass]
P=mv (Kg m/s) or (N s)

4. Dialectrics insulating sheet between plates
thumb in direction of proton - fingers in direction of magnetic field and palm will show you force
Fb=mf g= rhof Vf g
V=vFt/(m/l)
C=KepA/d

5. Net force/apparent weight broken done
Fnet=rhofluid vfluid g -rho object vobject g where the volumes are usually equal
Archimedes Principle/Bouyancy
billiard balls - no sticking total energy is conserved
T=2pvm/k

6. Parallel Circuits
Fnet=rhofluid vfluid g -rho object vobject g where the volumes are usually equal
V=constant - I=added - R=1/r added
Average Molecular Kinetic Energy
Flux (in webers)=Bcos?A

7. F(buoy) = pVg
General Pressure
Adiabatic and isothermal processes ec= TH-TL/
Archimedes Principle/Bouyancy
Fnx=FnSin?

8. F-F or NF-NF
Constructive: 2t=m? - Destructive: 2t=m?+1/2?
rho=m/v
Efficiency of a Heat Engine
Kinematic with Displacement - Velocity - Acceleration - and Time

9. snells law
n1sin?1=n2sin?2
Period in General
T=2pr/v
Constructive: 2t=m? - Destructive: 2t=m?+1/2?

10. Power (circuts)
?L=(coefficient of linear expansion)aLinitial?T
P=IV
A1V1=A2V2
Fy=FnCos?-Fg

11. Capacitance
Q=CV
?L=(coefficient of linear expansion)aLinitial?T
P1atm + 1/2rhoV1² + rhogh= P2atm + 1/2rhoV2² + rhogh
Kinematic with Velocity - Acceleration - and Displacement

12. Potential energy
273K and 1.013E5 pa
PE=mgh
billiard balls - no sticking total energy is conserved
V=added - Q=constant - C= 1/C

13. r in torque
billiard balls - no sticking total energy is conserved
moment arm - perpendicular distance from the force to the axis of rotation
P1atm + 1/2rhoV1² + rhogh= P2atm + 1/2rhoV2² + rhogh
counterclockwise

14. Isovolumetric/isochoric
Gravitational Potential Energy Anywhere
Adiabatic and isothermal processes ec= TH-TL/
T=2pvl/g
?v=0 - w=0 area under the curve is zero

15. Force on a current carrying wire in a magnetic field
General Pressure
F=BIL
L=n/2?
Kinetic Energy

16. Voltage-parallel plates
rho=m/v
Fnet=Fb-Fg
C=KepA/d
V=Ed

17. Specific gravity
SG=rho object/10³
Spring Potential Energy
Fny=FnCos?
W is positive when work is done on the system - compression - W is negative when work is done by the system - expansion

18. EMF (two formulas)
V=(331 +.6T) T=temp in Celsius
n1sin?1=n2sin?2
Spring Potential Energy
E=-N Change in flux/?t=Blv (v=velocity of the wire)

19. Flux
Flux (in webers)=Bcos?A
Fb=mf g= rhof Vf g
Fny=FnCos?
KE=1/2mv²

20. Banked curve - sum of the forces in the x
Continuity
thumb in direction of proton - fingers in direction of magnetic field and palm will show you force
Fx=mv²/r=FnSin?
Adiabatic and isothermal processes ec= TH-TL/

21. e = abs(W/Q)
n1sin?1=n2sin90
Efficiency of a Heat Engine
Constructive: 2t=m?+1/2? - Destructive: 2t=m?
?U=Q + W - heat added= heat + work

22. On a banked curve in circular motion - Fn in the y is
Kavg=(3/2)kbT
Fny=FnCos?
T=2pr/v
Bernoulli Principal

23. Voltage (circuts)
V=IR
T=2pvl/g
Pressure is constant ?P=0 w=-P?V
KE=1/2mv²

24. Force on a charged particle in a magnetic field
Kavg=(3/2)kbT
n1sin?1=n2sin?2
F=Bvsin?q
E=F/q (point charge)=KQ1/r² BREAK INTO VECTORS

25. Change in pressure
?P=rho(g)?h
F=BIL
C=KepA/d
?L=(coefficient of linear expansion)aLinitial?T

26. Net force/apparent weight in forces
Fny=FnCos?
T=2pvm/k
Force of Friction
Fnet=Fb-Fg

27. Total internal reflection
F=ma
F=Gm1m2/r²
n1sin?1=n2sin90
rho=m/v

28. Kirchhoffs loop rule [conservation of energy]
Fx=mv²/r=FnSin?
P=IV
sum of voltages must be zero
shows magnetic field created by a current. Thumb in direction of the current - fingers show direction of field

29. Capacitors in series
V=added - Q=constant - C= 1/C
Gravitational Potential Energy Anywhere
T=2pvl/g
Kavg=(3/2)kbT

30. Elastic collision
Constructive: 2t=m?+1/2? - Destructive: 2t=m?
billiard balls - no sticking total energy is conserved
273K and 1.013E5 pa
px and py are conserved

31. 1st right hand rule
shows magnetic field created by a current. Thumb in direction of the current - fingers show direction of field
Ug= Gm1m2/r
PE=1/2kx²
V=?f

32. Voltmeter
Power from Force
added in parallel - measures volts - high resistance
F=BIL
E=-N Change in flux/?t=Blv (v=velocity of the wire)

33. Kirchhoffs Junction rule
QH=QL +W and e=W/QH
Sum of all currents (I) entering=sum of all currents (I) leaving
SG=rho object/10³
Fgx=FgCos?

34. Adiabatic process
Fnet=Fb-Fg
?U=W - no heat added system (Q=0)
Fnx=FnSin?
Fgy=FgSin?

35. P + pgy + ½pv² = const.
P=mv (Kg m/s) or (N s)
Bernoulli Principal
Vab=Rated voltage-IR (r=internal resistance)
V=constant - Q=added - C=added

36. 3rd right hand rule
V=Ed
shows magnetic field created by a current. Thumb in direction of the current - fingers show direction of field
thumb in direction of proton - fingers in direction of magnetic field and palm will show you force
Fny=FnCos?

37. Current
I=?q/?t
Work
T=2pvl/g
E=-N Change in flux/?t=Blv (v=velocity of the wire)

38. Absolute pressure
V=Ed
f=mv²/r
Temperature is constant - ?U=0 - -Q=W
P=Patm + rho g h

39. Force buoyancy (2 formulas)
Fb=mf g= rhof Vf g
Pin=Pout=Fin/Ain=Fout/Aout
F=Bvsin?q
on a solenoid wrap finger around direction of current - thumb will point in north pole direction

40. Hookes law
Sum of all currents (I) entering=sum of all currents (I) leaving
F=kx
Gravitational Potential Energy Anywhere
a=v²/r

41. Magnitude of gravitational forces between objects
Fnet=rhofluid vfluid g -rho object vobject g where the volumes are usually equal
moment arm - perpendicular distance from the force to the axis of rotation
Average Speed of each Molecule
F=Gm1m2/r²

42. Positive torque
counterclockwise
Work
Ideal Gas Law
J=?vm=F?t

43. Banked curve - sum of the forces in the y
Force of Spring
Fnx=FnSin?
Fy=FnCos?-Fg
A1V1=A2V2

44. p = mv
V=?f
Constructive: 2t=m?+1/2? - Destructive: 2t=m?
Momentum
Flux (in webers)=Bcos?A

45. Centripetal force
V=constant - Q=added - C=added
L=n/2?
W is positive when work is done on the system - compression - W is negative when work is done by the system - expansion
f=mv²/r

46. Power - simple formula (mechanics)
QH=QL +W and e=W/QH
P=W/T=FD/T=FV
T=2pvm/k
Momentum

47. Voltage-charges formula (2)
V=W/Q=KQ/r NO VECTORS
Pressure is constant ?P=0 w=-P?V
px and py are conserved
T=2pr/v

48. F(spring) = -kx
V=W/Q=KQ/r NO VECTORS
Force of Spring
1/2QV=U
moment arm - perpendicular distance from the force to the axis of rotation

49. torque
t=Fr - force must be perpendicular to the moment arm and the axis of rotation
sum of voltages must be zero
F=Gm1m2/r²
V=IR

50. Isobaric process
V=added - Q=constant - C= 1/C
clockwise
Pressure is constant ?P=0 w=-P?V
V=W/Q=KQ/r NO VECTORS