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AP Physics B: Formulas

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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. W
W is positive when work is done on the system - compression - W is negative when work is done by the system - expansion
Q=CV
?v=0 - w=0 area under the curve is zero
Centripetal Acceleration

2. F-NF or vice versa
Constructive: 2t=m?+1/2? - Destructive: 2t=m?
W is positive when work is done on the system - compression - W is negative when work is done by the system - expansion
Q=CV
f=mv²/r

3. Adiabatic process
Efficiency of an Ideal Engine
Kinematic with Velocity - Acceleration - and Time
R=rho L/A A=cross sectional area
?U=W - no heat added system (Q=0)

4. Dialectrics insulating sheet between plates
Kinematic with Velocity - Acceleration - and Time
C=KepA/d
?U=Q + W - heat added= heat + work
Constructive: 2t=m? - Destructive: 2t=m?+1/2?

5. Engines (2 equations)
rho=m/v
Period in General
QH=QL +W and e=W/QH
q=K?AT/L

6. Magnitude of gravitational forces between objects
Fy=FnCos?-Fg
F=Gm1m2/r²
?L=(coefficient of linear expansion)aLinitial?T
QH=QL +W and e=W/QH

7. PE of a spring
Fb=mf g= rhof Vf g
PE=1/2kx²
F=BIL
q=K?AT/L

8. v = v0 + at
T=2pvl/g
PV=nRT - PV=N (# of molecules)kb (bozons constant)T
Kinematic with Velocity - Acceleration - and Time
Fgx=FgCos?

9. Banked curve - sum of the forces in the x
Fx=mv²/r=FnSin?
V=constant - Q=added - C=added
v3kT/m [mass per molecule] - v3RT/M [molar mass]
Pin=Pout=Fin/Ain=Fout/Aout

10. e = (T(hot) - T(cold))/T(hot)
W=Fd=mad - direction of force must be same as direction of distance
Force of Spring
Efficiency of an Ideal Engine
KE=1/2mv²

11. Change in pressure
V=(331 +.6T) T=temp in Celsius
J=?vm=F?t
?P=rho(g)?h
Ft=0

12. Series Circuits
Sum of all currents (I) entering=sum of all currents (I) leaving
Kinetic Energy
J=?vm=F?t
V=added - I=constant - R= added

13. Hookes law
Pin=Pout=Fin/Ain=Fout/Aout
Fgx=FgCos?
thumb in direction of proton - fingers in direction of magnetic field and palm will show you force
F=kx

14. Flux
moment arm - perpendicular distance from the force to the axis of rotation
Flux (in webers)=Bcos?A
Q=CV
Fy=FnCos?-Fg

15. Voltmeter
General Pressure
?P=rho(g)?h
T=2pr/v
added in parallel - measures volts - high resistance

16. 1st right hand rule
W=Fd=mad - direction of force must be same as direction of distance
n1sin?1=n2sin90
1ev=1.6E-19J
shows magnetic field created by a current. Thumb in direction of the current - fingers show direction of field

17. F-F or NF-NF
Constructive: 2t=m? - Destructive: 2t=m?+1/2?
E=F/q (point charge)=KQ1/r² BREAK INTO VECTORS
V=vFt/(m/l)
Work

18. On an inclined plane - gravity in the x
Fnet=rhofluid vfluid g -rho object vobject g where the volumes are usually equal
?P=rho(g)?h
?L=(coefficient of linear expansion)aLinitial?T
Fgx=FgCos?

19. F(friction) = µN
Fnet=rhofluid vfluid g -rho object vobject g where the volumes are usually equal
Force of Friction
Fx=mv²/r=FnSin?
Flux (in webers)=Bcos?A

20. Bernoulli's Equation [Conservation of energy]
Constructive: 2t=m?+1/2? - Destructive: 2t=m?
P=W/T=FD/T=FV
P1atm + 1/2rhoV1² + rhogh= P2atm + 1/2rhoV2² + rhogh
added in parallel - measures volts - high resistance

21. Natural frequency open tube/not in a tub
T=2pr/v
Efficiency of an Ideal Engine
L=n/2?
Ideal Gas Law

22. Critical speed is
General Pressure
V=?f
V=added - Q=constant - C= 1/C
Ft=0

23. P = P0 + pgh
Pressure from Depth
T=2pvl/g
I=?q/?t
Fb=mf g= rhof Vf g

24. Isothermal process
Fb=mf g= rhof Vf g
Temperature is constant - ?U=0 - -Q=W
shows magnetic field created by a current. Thumb in direction of the current - fingers show direction of field
V=constant - I=added - R=1/r added

25. U(spring) = ½kx²
Spring Potential Energy
F=kQ1Q2/r² BREAK INTO VECTORS
F=kx
rho=m/v

26. Force buoyancy (2 formulas)
moment arm - perpendicular distance from the force to the axis of rotation
Flux (in webers)=Bcos?A
Fb=mf g= rhof Vf g
Efficiency of a Heat Engine

27. F(spring) = -kx
Fgx=FgCos?
Momentum
Force of Spring
Force of Gravity

28. Ammeter
1/2QV=U
in series - measures current - low resistance
Pressure from Depth
A1V1=A2V2

29. Period for circular motion
T=2pr/v
billiard balls - no sticking total energy is conserved
f=mv²/r
P=Patm + rho g h

30. P = F/A
General Pressure
Adiabatic and isothermal processes ec= TH-TL/
n1sin?1=n2sin?2
P=mv (Kg m/s) or (N s)

31. Negative torque
clockwise
Centripetal Acceleration
T=2pvl/g
QH=QL +W and e=W/QH

32. Work - simple formula
?v=0 - w=0 area under the curve is zero
W=Fd=mad - direction of force must be same as direction of distance
f=mv²/r
F=Bvsin?q

33. Voltage-charges formula (2)
F=kQ1Q2/r² BREAK INTO VECTORS
F=Gm1m2/r²
V=W/Q=KQ/r NO VECTORS
General Pressure

34. Simple harmonic motion - spring
Temperature is constant - ?U=0 - -Q=W
P=Patm + rho g h
V=(331 +.6T) T=temp in Celsius
T=2pvm/k

35. Centripetal acceleration
General Pressure
W=KEf-KEi
a=v²/r
Continuity

36. torque
V=IR
t=Fr - force must be perpendicular to the moment arm and the axis of rotation
n1sin?1=n2sin90
n1sin?1=n2sin?2

37. Positive torque
counterclockwise
Work
F=BIL
Power from Force

38. v² = v0² + 2a(x-x0)
Kinematic with Velocity - Acceleration - and Displacement
Vf=Vi+ at - Vf²=Vi² +2ad - d=1/2 a t² +vit
1ev=1.6E-19J
T=2pvl/g

39. On an inclined plane - gravity in the y
in series - measures current - low resistance
P1atm + 1/2rhoV1² + rhogh= P2atm + 1/2rhoV2² + rhogh
Fgy=FgSin?
W is positive when work is done on the system - compression - W is negative when work is done by the system - expansion

40. Specific gravity
shows magnetic field created by a current. Thumb in direction of the current - fingers show direction of field
SG=rho object/10³
P1atm + 1/2rhoV1² + rhogh= P2atm + 1/2rhoV2² + rhogh
?v=0 - w=0 area under the curve is zero

41. PV = nRT = NkT
F=Bvsin?q
Average Molecular Kinetic Energy
Ideal Gas Law
I=?q/?t

42. Continuity equation [Conservation of mass]
L=n/4? has to be odd numbers
W is positive when work is done on the system - compression - W is negative when work is done by the system - expansion
Average Molecular Kinetic Energy
A1V1=A2V2

43. Ideal gas laws
Fx=mv²/r=FnSin?
L=n/4? has to be odd numbers
Continuity
PV=nRT - PV=N (# of molecules)kb (bozons constant)T

44. Kinetic energy
f=mv²/r
KE=1/2mv²
PV=nRT - PV=N (# of molecules)kb (bozons constant)T
Fy=FnCos?-Fg

45. P = Fvcos?
Pressure is constant ?P=0 w=-P?V
Fny=FnCos?
Power from Force
V=IR

46. U(gravitational) = -(Gm1m2/r)
Kavg=(3/2)kbT
Gravitational Potential Energy Anywhere
added in parallel - measures volts - high resistance
V=constant - I=added - R=1/r added

47. Vectors in momentum
J=?vm=F?t
Kinetic Energy
L=n/2?
px and py are conserved

48. 2nd right hand rule
on a solenoid wrap finger around direction of current - thumb will point in north pole direction
rho=m/v
F=kQ1Q2/r² BREAK INTO VECTORS
shows magnetic field created by a current. Thumb in direction of the current - fingers show direction of field

49. Vsound
V=(331 +.6T) T=temp in Celsius
?v=0 - w=0 area under the curve is zero
Fnet=Fb-Fg
V=constant - I=added - R=1/r added

50. P + pgy + ½pv² = const.
Thermal Conductivity
PV=nRT - PV=N (# of molecules)kb (bozons constant)T
Bernoulli Principal
General Pressure

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AP Physics B: Formulas

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Agile Development

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