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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. Net force/apparent weight in forces
Fnet=Fb-Fg
KE=1/2mv²
Flux (in webers)=Bcos?A
Ideal Gas Law

2. F(gravity) = -(Gm1m2/r²)
Thermal Conductivity
Adiabatic and isothermal processes ec= TH-TL/
F=kQ1Q2/r² BREAK INTO VECTORS
Force of Gravity

3. Total internal reflection
A1V1=A2V2
P=Patm + rho g h
moment arm - perpendicular distance from the force to the axis of rotation
n1sin?1=n2sin90

4. Engines (2 equations)
QH=QL +W and e=W/QH
Bernoulli Principal
V=constant - I=added - R=1/r added
Power from Force

5. heat flow through a window or door
q=K?AT/L
F=kx
Pin=Pout=Fin/Ain=Fout/Aout
thumb in direction of proton - fingers in direction of magnetic field and palm will show you force

6. Kirchhoffs Junction rule
Fgy=FgSin?
W is positive when work is done on the system - compression - W is negative when work is done by the system - expansion
Spring Potential Energy
Sum of all currents (I) entering=sum of all currents (I) leaving

7. Isobaric process
V=added - Q=constant - C= 1/C
n1sin?1=n2sin?2
Fgy=FgSin?
Pressure is constant ?P=0 w=-P?V

8. EMF (two formulas)
V=constant - I=added - R=1/r added
F=kQ1Q2/r² BREAK INTO VECTORS
E=-N Change in flux/?t=Blv (v=velocity of the wire)
V=(331 +.6T) T=temp in Celsius

9. Net force/apparent weight broken done
W=Fd=mad - direction of force must be same as direction of distance
Fnet=Fb-Fg
Fnet=rhofluid vfluid g -rho object vobject g where the volumes are usually equal
F=BIL

10. Bernoulli's Equation [Conservation of energy]
V=W/Q=KQ/r NO VECTORS
P1atm + 1/2rhoV1² + rhogh= P2atm + 1/2rhoV2² + rhogh
added in parallel - measures volts - high resistance
?P=rho(g)?h

11. Couloms law (force between two charged objects)
V=added - I=constant - R= added
Fnet=Fb-Fg
KE=1/2mv²
F=kQ1Q2/r² BREAK INTO VECTORS

12. Power - simple formula (mechanics)
P=W/T=FD/T=FV
Spring Potential Energy
V=?f
R=rho L/A A=cross sectional area

13. Banked curve - sum of the forces in the y
Fy=FnCos?-Fg
Thermal Conductivity
Fnx=FnSin?
Constructive: 2t=m? - Destructive: 2t=m?+1/2?

14. Voltage (circuts)
Fnet=Fb-Fg
F=Bvsin?q
V=IR
n1sin?1=n2sin?2

15. Magnitude of gravitational forces between objects
F=Gm1m2/r²
F=BIL
Flux (in webers)=Bcos?A
General Pressure

16. Force on a charged particle in a magnetic field
?L=(coefficient of linear expansion)aLinitial?T
A1V1=A2V2
Centripetal Acceleration
F=Bvsin?q

17. Change in pressure
C=KepA/d
P=W/T=FD/T=FV
?L=(coefficient of linear expansion)aLinitial?T
?P=rho(g)?h

18. Banked curve - sum of the forces in the x
W=Fd=mad - direction of force must be same as direction of distance
?U=W - no heat added system (Q=0)
V=Ed
Fx=mv²/r=FnSin?

19. Adiabatic process
PV=nRT - PV=N (# of molecules)kb (bozons constant)T
?U=W - no heat added system (Q=0)
W=KEf-KEi
Kinematic with Velocity - Acceleration - and Time

20. Centripetal force
Average Molecular Kinetic Energy
F=Gm1m2/r²
f=mv²/r
Archimedes Principle/Bouyancy

21. P = P0 + pgh
Fnet=Fb-Fg
Pressure from Depth
Ft=0
V=added - I=constant - R= added

22. Period for a spring in simple harmonic motion
Period in General
W=KEf-KEi
E=-N Change in flux/?t=Blv (v=velocity of the wire)
T=2pvm/k

23. snells law
P=W/T=FD/T=FV
n1sin?1=n2sin?2
added in parallel - measures volts - high resistance
V=W/Q=KQ/r NO VECTORS

24. A1V1 = A2V2
Period in General
J=?vm=F?t
Continuity
moment arm - perpendicular distance from the force to the axis of rotation

25. Positive torque
Period in General
L=n/2?
QH=QL +W and e=W/QH
counterclockwise

26. Period for a pendulum in simple harmonic motion
Fnet=rhofluid vfluid g -rho object vobject g where the volumes are usually equal
T=2pvl/g
Kavg=(3/2)kbT
A1V1=A2V2

27. Series Circuits
?U=W - no heat added system (Q=0)
V=added - I=constant - R= added
C=KepA/d
1ev=1.6E-19J

28. Work - simple formula
Efficiency of a Heat Engine
W=Fd=mad - direction of force must be same as direction of distance
Sum of all currents (I) entering=sum of all currents (I) leaving
?P=rho(g)?h

29. Critical speed is
F=Gm1m2/r²
Fnx=FnSin?
Average Speed of each Molecule
Ft=0

30. K = (3/2)kT
Sum of all currents (I) entering=sum of all currents (I) leaving
Kinetic Energy
Average Molecular Kinetic Energy
Ft=0

31. Voltage-parallel plates
Momentum
Centripetal Acceleration
PE=1/2kx²
V=Ed

32. Continuity equation [Conservation of mass]
A1V1=A2V2
Average Molecular Kinetic Energy
?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

33. Simple density formula
Work
Kinematic with Displacement - Velocity - Acceleration - and Time
n1sin?1=n2sin90
rho=m/v

34. On an inclined plane - gravity in the x
Adiabatic and isothermal processes ec= TH-TL/
PE=1/2kx²
Continuity
Fgx=FgCos?

35. natural frequencies in a closed tube
Constructive: 2t=m? - Destructive: 2t=m?+1/2?
Pressure from Depth
L=n/4? has to be odd numbers
Spring Potential Energy

36. Electron volts
Constructive: 2t=m?+1/2? - Destructive: 2t=m?
1ev=1.6E-19J
PE=1/2kx²
C=KepA/d

37. Capacitors in parallel
V=constant - Q=added - C=added
P=Patm + rho g h
273K and 1.013E5 pa
Power from Force

38. The three kinematics equations
1/2QV=U
Momentum
F=kx
Vf=Vi+ at - Vf²=Vi² +2ad - d=1/2 a t² +vit

39. Pascals principle
f=mv²/r
clockwise
Pin=Pout=Fin/Ain=Fout/Aout
V=vFt/(m/l)

40. K = ½mv²
P1atm + 1/2rhoV1² + rhogh= P2atm + 1/2rhoV2² + rhogh
Constructive: 2t=m? - Destructive: 2t=m?+1/2?
C=KepA/d
Kinetic Energy

41. Voltage-charges formula (2)
V=W/Q=KQ/r NO VECTORS
Ug= Gm1m2/r
E=-N Change in flux/?t=Blv (v=velocity of the wire)
Constructive: 2t=m?+1/2? - Destructive: 2t=m?

42. 3rd right hand rule
thumb in direction of proton - fingers in direction of magnetic field and palm will show you force
Continuity
Efficiency of an Ideal Engine
Force of Gravity

43. H = (kA?T)/L
C=KepA/d
Thermal Conductivity
W=Fd=mad - direction of force must be same as direction of distance
1/2QV=U

44. e = (T(hot) - T(cold))/T(hot)
Efficiency of an Ideal Engine
?P=rho(g)?h
Fgx=FgCos?
Force of Gravity

45. Resistivity in a wire
?L=(coefficient of linear expansion)aLinitial?T
clockwise
R=rho L/A A=cross sectional area
P=F/A=rho(g)h

46. Kirchhoffs loop rule [conservation of energy]
Force of Spring
Period in General
Kavg=(3/2)kbT
sum of voltages must be zero

47. W
Pin=Pout=Fin/Ain=Fout/Aout
Q=CV
W is positive when work is done on the system - compression - W is negative when work is done by the system - expansion
E=F/q (point charge)=KQ1/r² BREAK INTO VECTORS

48. Ideal gas laws
V=(331 +.6T) T=temp in Celsius
PV=nRT - PV=N (# of molecules)kb (bozons constant)T
rho=m/v
Power from Energy

49. Absolute pressure
?U=Q + W - heat added= heat + work
Continuity
V=added - Q=constant - C= 1/C
P=Patm + rho g h

50. F(friction) = µN
Q=CV
PE=1/2kx²
Force of Friction
P=mv (Kg m/s) or (N s)