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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. Standard pressure and temperature and pressure
C=KepA/d
Pressure from Depth
Efficiency of a Heat Engine
273K and 1.013E5 pa

2. Work - simple formula
PE=1/2kx²
Vf=Vi+ at - Vf²=Vi² +2ad - d=1/2 a t² +vit
W=Fd=mad - direction of force must be same as direction of distance
Adiabatic and isothermal processes ec= TH-TL/

3. Period for a spring in simple harmonic motion
Flux (in webers)=Bcos?A
T=2pvm/k
Fgy=FgSin?
Force of Gravity

4. Banked curve - sum of the forces in the x
E=-N Change in flux/?t=Blv (v=velocity of the wire)
T=2pr/v
V=constant - I=added - R=1/r added
Fx=mv²/r=FnSin?

5. Simple force equation
a=v²/r
Spring Potential Energy
F=ma
Gravitational Potential Energy Anywhere

6. W
W is positive when work is done on the system - compression - W is negative when work is done by the system - expansion
Gravitational Potential Energy Anywhere
Archimedes Principle/Bouyancy
F=BIL

7. Isothermal process
W=KEf-KEi
n1sin?1=n2sin?2
F=ma
Temperature is constant - ?U=0 - -Q=W

8. Net force/apparent weight broken done
rho=m/v
Fnet=rhofluid vfluid g -rho object vobject g where the volumes are usually equal
Constructive: 2t=m?+1/2? - Destructive: 2t=m?
1/2QV=U

9. Capacitors in parallel
Momentum
in series - measures current - low resistance
Fny=FnCos?
V=constant - Q=added - C=added

10. Velocity of sound in a strong
Kinematic with Velocity - Acceleration - and Displacement
Power from Energy
V=vFt/(m/l)
Fgx=FgCos?

11. H = (kA?T)/L
Spring Potential Energy
billiard balls - no sticking total energy is conserved
Archimedes Principle/Bouyancy
Thermal Conductivity

12. Adiabatic process
T=2pvl/g
Fy=FnCos?-Fg
?U=W - no heat added system (Q=0)
Pressure is constant ?P=0 w=-P?V

13. F(gravity) = -(Gm1m2/r²)
t=Fr - force must be perpendicular to the moment arm and the axis of rotation
Pressure from Depth
Force of Gravity
V=constant - Q=added - C=added

14. Vectors in momentum
px and py are conserved
Fy=FnCos?-Fg
F=kQ1Q2/r² BREAK INTO VECTORS
v3kT/m [mass per molecule] - v3RT/M [molar mass]

15. Pascals principle
Force of Gravity
?L=(coefficient of linear expansion)aLinitial?T
Ft=0
Pin=Pout=Fin/Ain=Fout/Aout

16. Ammeter
Vab=Rated voltage-IR (r=internal resistance)
T=2pvl/g
Q=CV
in series - measures current - low resistance

17. Vsound
moment arm - perpendicular distance from the force to the axis of rotation
V=(331 +.6T) T=temp in Celsius
W=KEf-KEi
E=F/q (point charge)=KQ1/r² BREAK INTO VECTORS

18. K = (3/2)kT
Average Molecular Kinetic Energy
a=v²/r
Fgx=FgCos?
T=2pvl/g

19. Electron volts
?v=0 - w=0 area under the curve is zero
1ev=1.6E-19J
Fgy=FgSin?
V=added - Q=constant - C= 1/C

20. On a banked curve in circular motion - Fn in the y is
billiard balls - no sticking total energy is conserved
Kinematic with Velocity - Acceleration - and Displacement
KE=1/2mv²
Fny=FnCos?

21. a(centripetal) = v²/r
General Pressure
Centripetal Acceleration
counterclockwise
Vab=Rated voltage-IR (r=internal resistance)

22. Engines (2 equations)
Ideal Gas Law
Constructive: 2t=m? - Destructive: 2t=m?+1/2?
QH=QL +W and e=W/QH
T=2pvl/g

23. K = ½mv²
Kinetic Energy
Constructive: 2t=m?+1/2? - Destructive: 2t=m?
Flux (in webers)=Bcos?A
billiard balls - no sticking total energy is conserved

24. Thermal expansion
W=Fd=mad - direction of force must be same as direction of distance
F=kx
?L=(coefficient of linear expansion)aLinitial?T
Centripetal Acceleration

25. Voltmeter
Spring Potential Energy
a=v²/r
F=kx
added in parallel - measures volts - high resistance

26. Flux
Flux (in webers)=Bcos?A
Force of Friction
SG=rho object/10³
Work

27. W = F?rcos?
Work
C=KepA/d
Gravitational Potential Energy Anywhere
V=constant - I=added - R=1/r added

28. Isobaric process
Pressure is constant ?P=0 w=-P?V
thumb in direction of proton - fingers in direction of magnetic field and palm will show you force
Power from Force
PE=mgh

29. Positive torque
F=kQ1Q2/r² BREAK INTO VECTORS
counterclockwise
V=(331 +.6T) T=temp in Celsius
Pin=Pout=Fin/Ain=Fout/Aout

30. Continuity equation [Conservation of mass]
Sum of all currents (I) entering=sum of all currents (I) leaving
E=F/q (point charge)=KQ1/r² BREAK INTO VECTORS
P=F/A=rho(g)h
A1V1=A2V2

31. P = Fvcos?
Power from Force
V=constant - I=added - R=1/r added
273K and 1.013E5 pa
Force of Friction

32. P + pgy + ½pv² = const.
clockwise
Bernoulli Principal
Q=CV
Kinematic with Displacement - Velocity - Acceleration - and Time

33. F(buoy) = pVg
Archimedes Principle/Bouyancy
Fgy=FgSin?
billiard balls - no sticking total energy is conserved
Fgx=FgCos?

34. F(spring) = -kx
on a solenoid wrap finger around direction of current - thumb will point in north pole direction
Ideal Gas Law
Force of Spring
Kavg=(3/2)kbT

35. 2nd right hand rule
Vab=Rated voltage-IR (r=internal resistance)
J=?vm=F?t
Constructive: 2t=m? - Destructive: 2t=m?+1/2?
on a solenoid wrap finger around direction of current - thumb will point in north pole direction

36. Absolute pressure
Work
Fx=mv²/r=FnSin?
Fnet=Fb-Fg
P=Patm + rho g h

37. Period for circular motion
C=KepA/d
moment arm - perpendicular distance from the force to the axis of rotation
Ft=0
T=2pr/v

38. PV = nRT = NkT
Ideal Gas Law
P=W/T=FD/T=FV
1/2QV=U
W=Fd=mad - direction of force must be same as direction of distance

39. On an inclined plane - gravity in the x
J=?vm=F?t
?L=(coefficient of linear expansion)aLinitial?T
Fgx=FgCos?
F=Bvsin?q

40. Net force/apparent weight in forces
Fnet=Fb-Fg
q=K?AT/L
Fy=FnCos?-Fg
P=F/A=rho(g)h

41. Natural frequency open tube/not in a tub
px and py are conserved
Spring Potential Energy
L=n/2?
Force of Spring

42. Bernoulli's Equation [Conservation of energy]
P1atm + 1/2rhoV1² + rhogh= P2atm + 1/2rhoV2² + rhogh
Constructive: 2t=m? - Destructive: 2t=m?+1/2?
Fnet=Fb-Fg
shows magnetic field created by a current. Thumb in direction of the current - fingers show direction of field

43. Capacitance
Efficiency of an Ideal Engine
Fnet=Fb-Fg
Q=CV
Archimedes Principle/Bouyancy

44. Force on a charged particle in a magnetic field
Ft=0
F=Bvsin?q
Pressure from Depth
f=mv²/r

45. Period for a pendulum in simple harmonic motion
1ev=1.6E-19J
Continuity
T=2pvl/g
Ft=0

46. Current
Kinematic with Displacement - Velocity - Acceleration - and Time
I=?q/?t
F=kx
a=v²/r

47. Voltage-parallel plates
T=2pvl/g
KE=1/2mv²
V=Ed
1ev=1.6E-19J

48. A1V1 = A2V2
?v=0 - w=0 area under the curve is zero
F=Bvsin?q
Continuity
Fgx=FgCos?

49. Magnitude of gravitational forces between objects
Fnet=Fb-Fg
F=Gm1m2/r²
Work
P=W/T=FD/T=FV

50. torque
Kinematic with Velocity - Acceleration - and Time
t=Fr - force must be perpendicular to the moment arm and the axis of rotation
E=-N Change in flux/?t=Blv (v=velocity of the wire)
Power from Force