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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. Specific gravity
Fnx=FnSin?
SG=rho object/10³
Fgx=FgCos?
V=W/Q=KQ/r NO VECTORS

2. Simple harmonic motion - spring
F=ma
T=2pvm/k
Kinematic with Displacement - Velocity - Acceleration - and Time
L=n/4? has to be odd numbers

3. Net work
P=mv (Kg m/s) or (N s)
n1sin?1=n2sin90
t=Fr - force must be perpendicular to the moment arm and the axis of rotation
W=KEf-KEi

4. a(centripetal) = v²/r
moment arm - perpendicular distance from the force to the axis of rotation
Archimedes Principle/Bouyancy
T=2pvl/g
Centripetal Acceleration

5. Average kinetic energy
Kavg=(3/2)kbT
billiard balls - no sticking total energy is conserved
V=W/Q=KQ/r NO VECTORS
q=K?AT/L

6. Simple force equation
F=ma
clockwise
Ug= Gm1m2/r
P=mv (Kg m/s) or (N s)

7. PV = nRT = NkT
Ideal Gas Law
W=KEf-KEi
Fnet=rhofluid vfluid g -rho object vobject g where the volumes are usually equal
Kinetic Energy

8. Continuity equation [Conservation of mass]
moment arm - perpendicular distance from the force to the axis of rotation
PV=nRT - PV=N (# of molecules)kb (bozons constant)T
A1V1=A2V2
Kinematic with Velocity - Acceleration - and Time

9. Engines (2 equations)
PV=nRT - PV=N (# of molecules)kb (bozons constant)T
273K and 1.013E5 pa
?U=W - no heat added system (Q=0)
QH=QL +W and e=W/QH

10. EMF (two formulas)
1ev=1.6E-19J
E=-N Change in flux/?t=Blv (v=velocity of the wire)
Centripetal Acceleration
W=KEf-KEi

11. P(avg) = W/?t
V=?f
Thermal Conductivity
Ft=0
Power from Energy

12. Kirchhoffs loop rule [conservation of energy]
n1sin?1=n2sin90
T=2pvl/g
sum of voltages must be zero
PE=mgh

13. Kinetic energy
T=2pvm/k
KE=1/2mv²
Efficiency of an Ideal Engine
px and py are conserved

14. Standard pressure and temperature and pressure
moment arm - perpendicular distance from the force to the axis of rotation
t=Fr - force must be perpendicular to the moment arm and the axis of rotation
273K and 1.013E5 pa
px and py are conserved

15. v = v(3RT)/M = v(3KT)/µ
273K and 1.013E5 pa
t=Fr - force must be perpendicular to the moment arm and the axis of rotation
F=BIL
Average Speed of each Molecule

16. Hookes law
T=2pvm/k
Pin=Pout=Fin/Ain=Fout/Aout
F=kx
Ideal Gas Law

17. Elastic collision
PE=mgh
Temperature is constant - ?U=0 - -Q=W
V=(331 +.6T) T=temp in Celsius
billiard balls - no sticking total energy is conserved

18. T = 1/f
V=added - Q=constant - C= 1/C
Fx=mv²/r=FnSin?
Period in General
F=kx

19. Centripetal force
P=Patm + rho g h
counterclockwise
clockwise
f=mv²/r

20. Ideal gas laws
counterclockwise
J=?vm=F?t
f=mv²/r
PV=nRT - PV=N (# of molecules)kb (bozons constant)T

21. U(gravitational) = -(Gm1m2/r)
Gravitational Potential Energy Anywhere
Pin=Pout=Fin/Ain=Fout/Aout
Archimedes Principle/Bouyancy
Ug= Gm1m2/r

22. Capacitance
J=?vm=F?t
Q=CV
Fnet=rhofluid vfluid g -rho object vobject g where the volumes are usually equal
Average Speed of each Molecule

23. Period for a spring in simple harmonic motion
Ft=0
T=2pvm/k
J=?vm=F?t
?U=Q + W - heat added= heat + work

24. F-NF or vice versa
V=(331 +.6T) T=temp in Celsius
PV=nRT - PV=N (# of molecules)kb (bozons constant)T
Constructive: 2t=m?+1/2? - Destructive: 2t=m?
Q=CV

25. Voltage-charges formula (2)
E=-N Change in flux/?t=Blv (v=velocity of the wire)
V=W/Q=KQ/r NO VECTORS
Temperature is constant - ?U=0 - -Q=W
n1sin?1=n2sin?2

26. Couloms law (force between two charged objects)
V=?f
V=constant - I=added - R=1/r added
billiard balls - no sticking total energy is conserved
F=kQ1Q2/r² BREAK INTO VECTORS

27. Power - simple formula (mechanics)
a=v²/r
PE=mgh
Q=CV
P=W/T=FD/T=FV

28. Force on a current carrying wire in a magnetic field
PE=1/2kx²
F=BIL
P=Patm + rho g h
q=K?AT/L

29. K = (3/2)kT
PE=mgh
Centripetal Acceleration
Average Molecular Kinetic Energy
P=mv (Kg m/s) or (N s)

30. Flux
Pin=Pout=Fin/Ain=Fout/Aout
Constructive: 2t=m? - Destructive: 2t=m?+1/2?
Flux (in webers)=Bcos?A
P=F/A=rho(g)h

31. H = (kA?T)/L
Temperature is constant - ?U=0 - -Q=W
Thermal Conductivity
Efficiency of a Heat Engine
V=vFt/(m/l)

32. W = F?rcos?
Fnet=rhofluid vfluid g -rho object vobject g where the volumes are usually equal
R=rho L/A A=cross sectional area
Work
Pressure from Depth

33. Momentum
P=mv (Kg m/s) or (N s)
Momentum
t=Fr - force must be perpendicular to the moment arm and the axis of rotation
V=(331 +.6T) T=temp in Celsius

34. snells law
A1V1=A2V2
?U=Q + W - heat added= heat + work
Force of Gravity
n1sin?1=n2sin?2

35. Capacitors in series
Pressure from Depth
Pin=Pout=Fin/Ain=Fout/Aout
V=added - Q=constant - C= 1/C
273K and 1.013E5 pa

36. Period for circular motion
t=Fr - force must be perpendicular to the moment arm and the axis of rotation
T=2pr/v
Pin=Pout=Fin/Ain=Fout/Aout
q=K?AT/L

37. P + pgy + ½pv² = const.
a=v²/r
Vf=Vi+ at - Vf²=Vi² +2ad - d=1/2 a t² +vit
Bernoulli Principal
PE=1/2kx²

38. Simple density formula
Fnet=Fb-Fg
counterclockwise
rho=m/v
Average Molecular Kinetic Energy

39. Velocity of a wave
f=mv²/r
L=n/2?
V=?f
Flux (in webers)=Bcos?A

40. Net force/apparent weight broken done
Constructive: 2t=m? - Destructive: 2t=m?+1/2?
t=Fr - force must be perpendicular to the moment arm and the axis of rotation
?U=W - no heat added system (Q=0)
Fnet=rhofluid vfluid g -rho object vobject g where the volumes are usually equal

41. Natural frequency open tube/not in a tub
Work
Ft=0
Kinematic with Displacement - Velocity - Acceleration - and Time
L=n/2?

42. Ammeter
in series - measures current - low resistance
shows magnetic field created by a current. Thumb in direction of the current - fingers show direction of field
Vab=Rated voltage-IR (r=internal resistance)
Fy=FnCos?-Fg

43. P = F/A
General Pressure
T=2pvl/g
Kinetic Energy
QH=QL +W and e=W/QH

44. Critical speed is
V=added - Q=constant - C= 1/C
P=Patm + rho g h
F=Bvsin?q
Ft=0

45. Negative torque
clockwise
Pressure from Depth
P=mv (Kg m/s) or (N s)
P1atm + 1/2rhoV1² + rhogh= P2atm + 1/2rhoV2² + rhogh

46. Net force/apparent weight in forces
V=added - Q=constant - C= 1/C
V=constant - Q=added - C=added
Kinematic with Displacement - Velocity - Acceleration - and Time
Fnet=Fb-Fg

47. F(friction) = µN
a=v²/r
Force of Friction
Fnet=rhofluid vfluid g -rho object vobject g where the volumes are usually equal
Fy=FnCos?-Fg

48. Power (circuts)
P=F/A=rho(g)h
Centripetal Acceleration
q=K?AT/L
P=IV

49. Voltage-parallel plates
Continuity
q=K?AT/L
T=2pvl/g
V=Ed

50. A1V1 = A2V2
counterclockwise
Constructive: 2t=m?+1/2? - Destructive: 2t=m?
Continuity
P=Patm + rho g h