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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. P = Fvcos?
V=constant - I=added - R=1/r added
Power from Force
counterclockwise
P=mv (Kg m/s) or (N s)

2. 1st right hand rule
q=K?AT/L
v3kT/m [mass per molecule] - v3RT/M [molar mass]
Fx=mv²/r=FnSin?
shows magnetic field created by a current. Thumb in direction of the current - fingers show direction of field

3. Pressure (2 formulas)
Fx=mv²/r=FnSin?
P=F/A=rho(g)h
W is positive when work is done on the system - compression - W is negative when work is done by the system - expansion
Constructive: 2t=m? - Destructive: 2t=m?+1/2?

4. Magnitude of gravitational forces between objects
General Pressure
Archimedes Principle/Bouyancy
v3kT/m [mass per molecule] - v3RT/M [molar mass]
F=Gm1m2/r²

5. On an inclined plane - gravity in the x
Ug= Gm1m2/r
Fgx=FgCos?
Pressure from Depth
t=Fr - force must be perpendicular to the moment arm and the axis of rotation

6. F-F or NF-NF
V=added - I=constant - R= added
V=W/Q=KQ/r NO VECTORS
Constructive: 2t=m? - Destructive: 2t=m?+1/2?
T=2pvm/k

7. Voltage-charges formula (2)
V=W/Q=KQ/r NO VECTORS
?U=W - no heat added system (Q=0)
Kinematic with Velocity - Acceleration - and Time
KE=1/2mv²

8. Average kinetic energy
QH=QL +W and e=W/QH
W=KEf-KEi
PE=1/2kx²
Kavg=(3/2)kbT

9. Ideal gas laws
PV=nRT - PV=N (# of molecules)kb (bozons constant)T
Work
T=2pr/v
PE=mgh

10. x = x0 + v0t + ½at²
Kinematic with Displacement - Velocity - Acceleration - and Time
?U=Q + W - heat added= heat + work
Continuity
Fy=FnCos?-Fg

11. Potential energy
counterclockwise
PE=mgh
E=F/q (point charge)=KQ1/r² BREAK INTO VECTORS
C=KepA/d

12. 3rd right hand rule
273K and 1.013E5 pa
thumb in direction of proton - fingers in direction of magnetic field and palm will show you force
Fny=FnCos?
clockwise

13. Banked curve - sum of the forces in the x
Fx=mv²/r=FnSin?
Work
f=mv²/r
Q=CV

14. Pascals principle
billiard balls - no sticking total energy is conserved
Kavg=(3/2)kbT
thumb in direction of proton - fingers in direction of magnetic field and palm will show you force
Pin=Pout=Fin/Ain=Fout/Aout

15. Carnot engine
?P=rho(g)?h
P=F/A=rho(g)h
moment arm - perpendicular distance from the force to the axis of rotation
Adiabatic and isothermal processes ec= TH-TL/

16. Simple density formula
SG=rho object/10³
Kinematic with Displacement - Velocity - Acceleration - and Time
L=n/2?
rho=m/v

17. Couloms law (force between two charged objects)
F=kQ1Q2/r² BREAK INTO VECTORS
thumb in direction of proton - fingers in direction of magnetic field and palm will show you force
V=vFt/(m/l)
PE=mgh

18. Isobaric process
L=n/2?
F=ma
Pressure is constant ?P=0 w=-P?V
Efficiency of a Heat Engine

19. Voltage (circuts)
v3kT/m [mass per molecule] - v3RT/M [molar mass]
C=KepA/d
V=IR
f=mv²/r

20. Period for circular motion
V=vFt/(m/l)
T=2pr/v
Kavg=(3/2)kbT
V=added - I=constant - R= added

21. e = (T(hot) - T(cold))/T(hot)
Average Speed of each Molecule
Efficiency of an Ideal Engine
Fy=FnCos?-Fg
on a solenoid wrap finger around direction of current - thumb will point in north pole direction

22. The three kinematics equations
Fnet=rhofluid vfluid g -rho object vobject g where the volumes are usually equal
Vf=Vi+ at - Vf²=Vi² +2ad - d=1/2 a t² +vit
V=IR
273K and 1.013E5 pa

23. Impulse
J=?vm=F?t
E=-N Change in flux/?t=Blv (v=velocity of the wire)
QH=QL +W and e=W/QH
Force of Friction

24. Velocity of a wave
T=2pr/v
W=Fd=mad - direction of force must be same as direction of distance
a=v²/r
V=?f

25. Flux
Temperature is constant - ?U=0 - -Q=W
Kinetic Energy
thumb in direction of proton - fingers in direction of magnetic field and palm will show you force
Flux (in webers)=Bcos?A

26. F(gravity) = -(Gm1m2/r²)
PE=1/2kx²
Force of Gravity
q=K?AT/L
W=KEf-KEi

27. Simple harmonic motion - spring
Thermal Conductivity
P=F/A=rho(g)h
T=2pvm/k
F=kx

28. Bernoulli's Equation [Conservation of energy]
P1atm + 1/2rhoV1² + rhogh= P2atm + 1/2rhoV2² + rhogh
Fny=FnCos?
W=KEf-KEi
A1V1=A2V2

29. Banked curve - sum of the forces in the y
Fy=FnCos?-Fg
Continuity
J=?vm=F?t
Flux (in webers)=Bcos?A

30. Parallel Circuits
Pressure is constant ?P=0 w=-P?V
Fx=mv²/r=FnSin?
V=constant - I=added - R=1/r added
V=?f

31. Electric field intensity
Ft=0
L=n/4? has to be odd numbers
E=F/q (point charge)=KQ1/r² BREAK INTO VECTORS
Fny=FnCos?

32. Velocity of sound in a strong
V=?f
Vab=Rated voltage-IR (r=internal resistance)
Flux (in webers)=Bcos?A
V=vFt/(m/l)

33. Dialectrics insulating sheet between plates
T=2pvl/g
a=v²/r
Fgy=FgSin?
C=KepA/d

34. Series Circuits
F=ma
V=added - I=constant - R= added
Constructive: 2t=m?+1/2? - Destructive: 2t=m?
Work

35. P = P0 + pgh
Pressure from Depth
v3kT/m [mass per molecule] - v3RT/M [molar mass]
Kavg=(3/2)kbT
?v=0 - w=0 area under the curve is zero

36. Work - simple formula
V=W/Q=KQ/r NO VECTORS
W=Fd=mad - direction of force must be same as direction of distance
?U=W - no heat added system (Q=0)
Ft=0

37. vrms (2 equations)
v3kT/m [mass per molecule] - v3RT/M [molar mass]
V=(331 +.6T) T=temp in Celsius
Average Molecular Kinetic Energy
Constructive: 2t=m? - Destructive: 2t=m?+1/2?

38. Force on a current carrying wire in a magnetic field
t=Fr - force must be perpendicular to the moment arm and the axis of rotation
V=W/Q=KQ/r NO VECTORS
W=KEf-KEi
F=BIL

39. v² = v0² + 2a(x-x0)
F=BIL
General Pressure
P1atm + 1/2rhoV1² + rhogh= P2atm + 1/2rhoV2² + rhogh
Kinematic with Velocity - Acceleration - and Displacement

40. Simple harmonic motion - pendulum
P=IV
T=2pvm/k
T=2pvl/g
Constructive: 2t=m? - Destructive: 2t=m?+1/2?

41. Critical speed is
Period in General
Ft=0
Pressure from Depth
?P=rho(g)?h

42. Net force/apparent weight broken done
Archimedes Principle/Bouyancy
Fnet=rhofluid vfluid g -rho object vobject g where the volumes are usually equal
Period in General
Bernoulli Principal

43. Energy of gravitational attraction
F=kQ1Q2/r² BREAK INTO VECTORS
Flux (in webers)=Bcos?A
Ug= Gm1m2/r
clockwise

44. U(spring) = ½kx²
in series - measures current - low resistance
W=KEf-KEi
E=F/q (point charge)=KQ1/r² BREAK INTO VECTORS
Spring Potential Energy

45. Voltage-parallel plates
Sum of all currents (I) entering=sum of all currents (I) leaving
V=Ed
F=Bvsin?q
Pressure from Depth

46. Energy in a capacitor
Fy=FnCos?-Fg
Kinetic Energy
1/2QV=U
rho=m/v

47. Force buoyancy (2 formulas)
Fb=mf g= rhof Vf g
Constructive: 2t=m?+1/2? - Destructive: 2t=m?
F=kQ1Q2/r² BREAK INTO VECTORS
V=added - I=constant - R= added

48. v = v(3RT)/M = v(3KT)/µ
q=K?AT/L
Average Speed of each Molecule
Vf=Vi+ at - Vf²=Vi² +2ad - d=1/2 a t² +vit
Average Molecular Kinetic Energy

49. Kirchhoffs loop rule [conservation of energy]
Force of Gravity
sum of voltages must be zero
a=v²/r
Continuity

50. U(gravitational) = -(Gm1m2/r)
W is positive when work is done on the system - compression - W is negative when work is done by the system - expansion
F=Gm1m2/r²
Constructive: 2t=m?+1/2? - Destructive: 2t=m?
Gravitational Potential Energy Anywhere