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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. Potential energy
PE=1/2kx²
PE=mgh
Flux (in webers)=Bcos?A
Kinetic Energy

2. Standard pressure and temperature and pressure
W is positive when work is done on the system - compression - W is negative when work is done by the system - expansion
Average Speed of each Molecule
273K and 1.013E5 pa
Force of Spring

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

4. Ideal gas laws
PV=nRT - PV=N (# of molecules)kb (bozons constant)T
V=IR
T=2pr/v
Work

5. P = F/A
General Pressure
R=rho L/A A=cross sectional area
F=ma
Adiabatic and isothermal processes ec= TH-TL/

6. Voltage across a battery terminal
V=?f
T=2pvm/k
Average Molecular Kinetic Energy
Vab=Rated voltage-IR (r=internal resistance)

7. e = (T(hot) - T(cold))/T(hot)
Efficiency of an Ideal Engine
f=mv²/r
Momentum
F=BIL

8. Adiabatic process
F=BIL
?U=W - no heat added system (Q=0)
V=?f
Power from Force

9. EMF (two formulas)
P=Patm + rho g h
E=-N Change in flux/?t=Blv (v=velocity of the wire)
px and py are conserved
Average Molecular Kinetic Energy

10. v = v0 + at
T=2pvm/k
Centripetal Acceleration
V=constant - I=added - R=1/r added
Kinematic with Velocity - Acceleration - and Time

11. On an inclined plane - gravity in the x
Fgx=FgCos?
Bernoulli Principal
sum of voltages must be zero
1ev=1.6E-19J

12. Magnitude of gravitational forces between objects
Fnet=Fb-Fg
F=Gm1m2/r²
Kavg=(3/2)kbT
T=2pr/v

13. T = 1/f
Period in General
Kinetic Energy
Force of Gravity
P=F/A=rho(g)h

14. U(spring) = ½kx²
Spring Potential Energy
F=ma
Kinematic with Velocity - Acceleration - and Time
P1atm + 1/2rhoV1² + rhogh= P2atm + 1/2rhoV2² + rhogh

15. Momentum
P=mv (Kg m/s) or (N s)
Centripetal Acceleration
A1V1=A2V2
Vf=Vi+ at - Vf²=Vi² +2ad - d=1/2 a t² +vit

16. Voltmeter
Power from Energy
?L=(coefficient of linear expansion)aLinitial?T
added in parallel - measures volts - high resistance
Fgy=FgSin?

17. Absolute pressure
V=IR
Fgy=FgSin?
P=Patm + rho g h
PE=mgh

18. Kirchhoffs loop rule [conservation of energy]
Work
Bernoulli Principal
sum of voltages must be zero
Adiabatic and isothermal processes ec= TH-TL/

19. v² = v0² + 2a(x-x0)
Fnx=FnSin?
Kinetic Energy
Kinematic with Velocity - Acceleration - and Displacement
Pressure is constant ?P=0 w=-P?V

20. Simple harmonic motion - pendulum
clockwise
in series - measures current - low resistance
Kinetic Energy
T=2pvl/g

21. Electric field intensity
E=F/q (point charge)=KQ1/r² BREAK INTO VECTORS
T=2pr/v
Kinematic with Velocity - Acceleration - and Time
PE=1/2kx²

22. K = (3/2)kT
Average Molecular Kinetic Energy
Q=CV
Bernoulli Principal
Force of Spring

23. v = v(3RT)/M = v(3KT)/µ
V=Ed
P1atm + 1/2rhoV1² + rhogh= P2atm + 1/2rhoV2² + rhogh
Average Speed of each Molecule
in series - measures current - low resistance

24. Simple density formula
Force of Friction
PE=mgh
v3kT/m [mass per molecule] - v3RT/M [molar mass]
rho=m/v

25. On a banked curve in circular motion - Fn in the y is
q=K?AT/L
Q=CV
n1sin?1=n2sin90
Fny=FnCos?

26. Force buoyancy (2 formulas)
T=2pvl/g
F=BIL
Fb=mf g= rhof Vf g
V=?f

27. Energy of gravitational attraction
Ug= Gm1m2/r
Fb=mf g= rhof Vf g
V=constant - Q=added - C=added
General Pressure

28. Capacitance
Q=CV
KE=1/2mv²
?U=W - no heat added system (Q=0)
Fgy=FgSin?

29. heat flow through a window or door
?v=0 - w=0 area under the curve is zero
QH=QL +W and e=W/QH
Archimedes Principle/Bouyancy
q=K?AT/L

30. Critical speed is
sum of voltages must be zero
Ft=0
P1atm + 1/2rhoV1² + rhogh= P2atm + 1/2rhoV2² + rhogh
V=constant - Q=added - C=added

31. Isothermal process
Ideal Gas Law
F=kQ1Q2/r² BREAK INTO VECTORS
Temperature is constant - ?U=0 - -Q=W
Fnet=rhofluid vfluid g -rho object vobject g where the volumes are usually equal

32. Total internal reflection
A1V1=A2V2
Fy=FnCos?-Fg
rho=m/v
n1sin?1=n2sin90

33. Simple force equation
Fnx=FnSin?
billiard balls - no sticking total energy is conserved
Vf=Vi+ at - Vf²=Vi² +2ad - d=1/2 a t² +vit
F=ma

34. Velocity of sound in a strong
a=v²/r
F=Gm1m2/r²
V=vFt/(m/l)
L=n/2?

35. Isobaric process
QH=QL +W and e=W/QH
Pressure is constant ?P=0 w=-P?V
Kinematic with Displacement - Velocity - Acceleration - and Time
Fgy=FgSin?

36. P(avg) = W/?t
thumb in direction of proton - fingers in direction of magnetic field and palm will show you force
Fnet=Fb-Fg
Power from Energy
?L=(coefficient of linear expansion)aLinitial?T

37. Electron volts
px and py are conserved
Centripetal Acceleration
1ev=1.6E-19J
Fb=mf g= rhof Vf g

38. Kirchhoffs Junction rule
Sum of all currents (I) entering=sum of all currents (I) leaving
V=(331 +.6T) T=temp in Celsius
Pressure from Depth
Flux (in webers)=Bcos?A

39. Kinetic energy
v3kT/m [mass per molecule] - v3RT/M [molar mass]
Adiabatic and isothermal processes ec= TH-TL/
Kavg=(3/2)kbT
KE=1/2mv²

40. Impulse
Flux (in webers)=Bcos?A
J=?vm=F?t
273K and 1.013E5 pa
P=Patm + rho g h

41. Force on a current carrying wire in a magnetic field
V=vFt/(m/l)
P=Patm + rho g h
F=BIL
V=?f

42. On an inclined plane - gravity in the y
Fgy=FgSin?
Gravitational Potential Energy Anywhere
n1sin?1=n2sin?2
Temperature is constant - ?U=0 - -Q=W

43. Energy in a capacitor
1/2QV=U
P=W/T=FD/T=FV
?U=W - no heat added system (Q=0)
Kinematic with Velocity - Acceleration - and Time

44. Natural frequency open tube/not in a tub
?U=W - no heat added system (Q=0)
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
Archimedes Principle/Bouyancy

45. Net force/apparent weight broken done
PE=mgh
Sum of all currents (I) entering=sum of all currents (I) leaving
Fnet=rhofluid vfluid g -rho object vobject g where the volumes are usually equal
in series - measures current - low resistance

46. Resistivity in a wire
E=-N Change in flux/?t=Blv (v=velocity of the wire)
P1atm + 1/2rhoV1² + rhogh= P2atm + 1/2rhoV2² + rhogh
Period in General
R=rho L/A A=cross sectional area

47. Centripetal acceleration
I=?q/?t
Spring Potential Energy
in series - measures current - low resistance
a=v²/r

48. Basic thermo equation
Fnet=Fb-Fg
P=IV
?U=Q + W - heat added= heat + work
V=added - Q=constant - C= 1/C

49. 3rd right hand rule
Fx=mv²/r=FnSin?
Adiabatic and isothermal processes ec= TH-TL/
thumb in direction of proton - fingers in direction of magnetic field and palm will show you force
Kinematic with Velocity - Acceleration - and Displacement

50. Vectors in momentum
px and py are conserved
?U=W - no heat added system (Q=0)
billiard balls - no sticking total energy is conserved
Flux (in webers)=Bcos?A