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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. v = v0 + at
V=IR
?U=Q + W - heat added= heat + work
Kinematic with Velocity - Acceleration - and Time
V=vFt/(m/l)

2. Capacitance
T=2pr/v
Kavg=(3/2)kbT
Q=CV
Pressure from Depth

3. v = v(3RT)/M = v(3KT)/µ
PV=nRT - PV=N (# of molecules)kb (bozons constant)T
Average Molecular Kinetic Energy
P1atm + 1/2rhoV1² + rhogh= P2atm + 1/2rhoV2² + rhogh
Average Speed of each Molecule

4. Isobaric process
clockwise
C=KepA/d
Pressure is constant ?P=0 w=-P?V
Centripetal Acceleration

5. Electric field intensity
E=F/q (point charge)=KQ1/r² BREAK INTO VECTORS
Period in General
W is positive when work is done on the system - compression - W is negative when work is done by the system - expansion
in series - measures current - low resistance

6. Capacitors in parallel
Sum of all currents (I) entering=sum of all currents (I) leaving
V=constant - Q=added - C=added
Kinematic with Velocity - Acceleration - and Time
Momentum

7. Vectors in momentum
Constructive: 2t=m?+1/2? - Destructive: 2t=m?
KE=1/2mv²
px and py are conserved
counterclockwise

8. Bernoulli's Equation [Conservation of energy]
P1atm + 1/2rhoV1² + rhogh= P2atm + 1/2rhoV2² + rhogh
?v=0 - w=0 area under the curve is zero
Average Molecular Kinetic Energy
V=Ed

9. T = 1/f
Period in General
E=-N Change in flux/?t=Blv (v=velocity of the wire)
I=?q/?t
Kavg=(3/2)kbT

10. On an inclined plane - gravity in the x
Fnet=rhofluid vfluid g -rho object vobject g where the volumes are usually equal
General Pressure
Fgx=FgCos?
Spring Potential Energy

11. Centripetal force
f=mv²/r
P1atm + 1/2rhoV1² + rhogh= P2atm + 1/2rhoV2² + rhogh
Constructive: 2t=m?+1/2? - Destructive: 2t=m?
billiard balls - no sticking total energy is conserved

12. snells law
Average Molecular Kinetic Energy
n1sin?1=n2sin?2
Archimedes Principle/Bouyancy
PV=nRT - PV=N (# of molecules)kb (bozons constant)T

13. Simple force equation
F=ma
n1sin?1=n2sin90
Flux (in webers)=Bcos?A
V=?f

14. Simple harmonic motion - spring
T=2pvm/k
I=?q/?t
V=added - I=constant - R= added
E=F/q (point charge)=KQ1/r² BREAK INTO VECTORS

15. Voltage-parallel plates
Power from Energy
Force of Spring
V=Ed
F=kx

16. Isothermal process
P=IV
F=BIL
F=ma
Temperature is constant - ?U=0 - -Q=W

17. Kirchhoffs loop rule [conservation of energy]
Centripetal Acceleration
V=constant - I=added - R=1/r added
Fgx=FgCos?
sum of voltages must be zero

18. Change in pressure
in series - measures current - low resistance
Fgx=FgCos?
?P=rho(g)?h
General Pressure

19. On an inclined plane - gravity in the y
Fgy=FgSin?
V=IR
added in parallel - measures volts - high resistance
PE=mgh

20. Kinetic energy
thumb in direction of proton - fingers in direction of magnetic field and palm will show you force
T=2pvl/g
Fnet=Fb-Fg
KE=1/2mv²

21. Flux
C=KepA/d
Flux (in webers)=Bcos?A
F=kQ1Q2/r² BREAK INTO VECTORS
E=F/q (point charge)=KQ1/r² BREAK INTO VECTORS

22. Energy in a capacitor
counterclockwise
1/2QV=U
E=-N Change in flux/?t=Blv (v=velocity of the wire)
F=ma

23. 1st right hand rule
?U=W - no heat added system (Q=0)
Fny=FnCos?
V=constant - Q=added - C=added
shows magnetic field created by a current. Thumb in direction of the current - fingers show direction of field

24. Capacitors in series
F=kQ1Q2/r² BREAK INTO VECTORS
V=added - Q=constant - C= 1/C
P=W/T=FD/T=FV
Ideal Gas Law

25. a(centripetal) = v²/r
Fnet=rhofluid vfluid g -rho object vobject g where the volumes are usually equal
T=2pvm/k
W=Fd=mad - direction of force must be same as direction of distance
Centripetal Acceleration

26. Vsound
V=(331 +.6T) T=temp in Celsius
Vf=Vi+ at - Vf²=Vi² +2ad - d=1/2 a t² +vit
1/2QV=U
Fgx=FgCos?

27. Power (circuts)
QH=QL +W and e=W/QH
V=constant - I=added - R=1/r added
P=IV
V=IR

28. Dialectrics insulating sheet between plates
Pin=Pout=Fin/Ain=Fout/Aout
Power from Force
C=KepA/d
Kinetic Energy

29. Net work
P1atm + 1/2rhoV1² + rhogh= P2atm + 1/2rhoV2² + rhogh
W=KEf-KEi
V=added - Q=constant - C= 1/C
F=kx

30. K = (3/2)kT
Average Molecular Kinetic Energy
Q=CV
?L=(coefficient of linear expansion)aLinitial?T
F=BIL

31. Electron volts
Momentum
Constructive: 2t=m? - Destructive: 2t=m?+1/2?
Ft=0
1ev=1.6E-19J

32. Basic thermo equation
?U=Q + W - heat added= heat + work
P=IV
Bernoulli Principal
W is positive when work is done on the system - compression - W is negative when work is done by the system - expansion

33. e = abs(W/Q)
Efficiency of a Heat Engine
Kavg=(3/2)kbT
Fy=FnCos?-Fg
Centripetal Acceleration

34. Adiabatic process
Average Molecular Kinetic Energy
?U=W - no heat added system (Q=0)
rho=m/v
Power from Energy

35. Isovolumetric/isochoric
P=IV
?v=0 - w=0 area under the curve is zero
Kinetic Energy
Pressure from Depth

36. Total internal reflection
Flux (in webers)=Bcos?A
n1sin?1=n2sin90
V=(331 +.6T) T=temp in Celsius
T=2pvm/k

37. heat flow through a window or door
V=?f
q=K?AT/L
V=IR
V=W/Q=KQ/r NO VECTORS

38. Hookes law
in series - measures current - low resistance
F=kx
Momentum
A1V1=A2V2

39. e = (T(hot) - T(cold))/T(hot)
Kinematic with Velocity - Acceleration - and Time
P=W/T=FD/T=FV
Efficiency of an Ideal Engine
Fnx=FnSin?

40. Specific gravity
SG=rho object/10³
Average Molecular Kinetic Energy
V=?f
L=n/4? has to be odd numbers

41. P(avg) = W/?t
Power from Force
Power from Energy
1/2QV=U
Fgx=FgCos?

42. Momentum
P=mv (Kg m/s) or (N s)
Work
PE=1/2kx²
Pressure is constant ?P=0 w=-P?V

43. Negative torque
F=Gm1m2/r²
rho=m/v
clockwise
f=mv²/r

44. F-F or NF-NF
Spring Potential Energy
A1V1=A2V2
Constructive: 2t=m? - Destructive: 2t=m?+1/2?
Force of Gravity

45. natural frequencies in a closed tube
Adiabatic and isothermal processes ec= TH-TL/
L=n/4? has to be odd numbers
P=Patm + rho g h
PE=1/2kx²

46. Force buoyancy (2 formulas)
Fb=mf g= rhof Vf g
counterclockwise
E=-N Change in flux/?t=Blv (v=velocity of the wire)
V=vFt/(m/l)

47. Impulse
Kinetic Energy
J=?vm=F?t
T=2pvl/g
V=?f

48. Power - simple formula (mechanics)
1/2QV=U
W=Fd=mad - direction of force must be same as direction of distance
F=kQ1Q2/r² BREAK INTO VECTORS
P=W/T=FD/T=FV

49. Net force/apparent weight broken done
in series - measures current - low resistance
Fnet=rhofluid vfluid g -rho object vobject g where the volumes are usually equal
KE=1/2mv²
f=mv²/r

50. 2nd right hand rule
in series - measures current - low resistance
V=added - I=constant - R= added
on a solenoid wrap finger around direction of current - thumb will point in north pole direction
Kinetic Energy