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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. EMF (two formulas)
Pressure from Depth
E=-N Change in flux/?t=Blv (v=velocity of the wire)
Fy=FnCos?-Fg
in series - measures current - low resistance

2. Potential energy
Pin=Pout=Fin/Ain=Fout/Aout
V=constant - Q=added - C=added
Force of Friction
PE=mgh

3. Period for a pendulum in simple harmonic motion
1/2QV=U
px and py are conserved
T=2pvl/g
rho=m/v

4. v² = v0² + 2a(x-x0)
Power from Energy
Pressure is constant ?P=0 w=-P?V
Vf=Vi+ at - Vf²=Vi² +2ad - d=1/2 a t² +vit
Kinematic with Velocity - Acceleration - and Displacement

5. U(spring) = ½kx²
clockwise
Adiabatic and isothermal processes ec= TH-TL/
PE=mgh
Spring Potential Energy

6. Absolute pressure
P=Patm + rho g h
Flux (in webers)=Bcos?A
t=Fr - force must be perpendicular to the moment arm and the axis of rotation
added in parallel - measures volts - high resistance

7. r in torque
Fgx=FgCos?
?v=0 - w=0 area under the curve is zero
273K and 1.013E5 pa
moment arm - perpendicular distance from the force to the axis of rotation

8. 1st right hand rule
shows magnetic field created by a current. Thumb in direction of the current - fingers show direction of field
E=F/q (point charge)=KQ1/r² BREAK INTO VECTORS
T=2pvl/g
Vf=Vi+ at - Vf²=Vi² +2ad - d=1/2 a t² +vit

9. Force on a current carrying wire in a magnetic field
Ft=0
F=BIL
?U=Q + W - heat added= heat + work
P=mv (Kg m/s) or (N s)

10. A1V1 = A2V2
Continuity
P=mv (Kg m/s) or (N s)
General Pressure
T=2pr/v

11. Voltage-parallel plates
P1atm + 1/2rhoV1² + rhogh= P2atm + 1/2rhoV2² + rhogh
V=Ed
T=2pvm/k
V=added - Q=constant - C= 1/C

12. Voltage (circuts)
T=2pvl/g
Pressure from Depth
V=IR
Force of Gravity

13. Power - simple formula (mechanics)
n1sin?1=n2sin90
a=v²/r
P=W/T=FD/T=FV
T=2pvm/k

14. P(avg) = W/?t
V=W/Q=KQ/r NO VECTORS
Fx=mv²/r=FnSin?
Fnet=rhofluid vfluid g -rho object vobject g where the volumes are usually equal
Power from Energy

15. Simple force equation
q=K?AT/L
F=ma
V=vFt/(m/l)
Thermal Conductivity

16. Velocity of sound in a strong
V=vFt/(m/l)
n1sin?1=n2sin?2
V=added - Q=constant - C= 1/C
Kavg=(3/2)kbT

17. v = v0 + at
Sum of all currents (I) entering=sum of all currents (I) leaving
Pressure is constant ?P=0 w=-P?V
clockwise
Kinematic with Velocity - Acceleration - and Time

18. Banked curve - sum of the forces in the y
PE=1/2kx²
T=2pvm/k
Fy=FnCos?-Fg
moment arm - perpendicular distance from the force to the axis of rotation

19. vrms (2 equations)
?U=Q + W - heat added= heat + work
v3kT/m [mass per molecule] - v3RT/M [molar mass]
Ug= Gm1m2/r
1ev=1.6E-19J

20. Natural frequency open tube/not in a tub
Kinematic with Displacement - Velocity - Acceleration - and Time
C=KepA/d
L=n/2?
P=Patm + rho g h

21. e = (T(hot) - T(cold))/T(hot)
V=added - Q=constant - C= 1/C
Efficiency of an Ideal Engine
W is positive when work is done on the system - compression - W is negative when work is done by the system - expansion
?U=W - no heat added system (Q=0)

22. Kirchhoffs loop rule [conservation of energy]
Ug= Gm1m2/r
sum of voltages must be zero
P=IV
W is positive when work is done on the system - compression - W is negative when work is done by the system - expansion

23. Voltage across a battery terminal
?P=rho(g)?h
PE=1/2kx²
J=?vm=F?t
Vab=Rated voltage-IR (r=internal resistance)

24. Thermal expansion
PV=nRT - PV=N (# of molecules)kb (bozons constant)T
thumb in direction of proton - fingers in direction of magnetic field and palm will show you force
PE=1/2kx²
?L=(coefficient of linear expansion)aLinitial?T

25. Simple harmonic motion - pendulum
P1atm + 1/2rhoV1² + rhogh= P2atm + 1/2rhoV2² + rhogh
T=2pvl/g
L=n/4? has to be odd numbers
Force of Spring

26. P + pgy + ½pv² = const.
F=Gm1m2/r²
?U=Q + W - heat added= heat + work
Temperature is constant - ?U=0 - -Q=W
Bernoulli Principal

27. Kirchhoffs Junction rule
a=v²/r
E=F/q (point charge)=KQ1/r² BREAK INTO VECTORS
on a solenoid wrap finger around direction of current - thumb will point in north pole direction
Sum of all currents (I) entering=sum of all currents (I) leaving

28. Net force/apparent weight in forces
t=Fr - force must be perpendicular to the moment arm and the axis of rotation
Power from Force
Fnet=Fb-Fg
C=KepA/d

29. Current
Centripetal Acceleration
P1atm + 1/2rhoV1² + rhogh= P2atm + 1/2rhoV2² + rhogh
W=Fd=mad - direction of force must be same as direction of distance
I=?q/?t

30. F(friction) = µN
Force of Gravity
Sum of all currents (I) entering=sum of all currents (I) leaving
Force of Friction
T=2pvl/g

31. P = Fvcos?
Power from Force
on a solenoid wrap finger around direction of current - thumb will point in north pole direction
Force of Gravity
V=(331 +.6T) T=temp in Celsius

32. Elastic collision
moment arm - perpendicular distance from the force to the axis of rotation
billiard balls - no sticking total energy is conserved
in series - measures current - low resistance
L=n/4? has to be odd numbers

33. e = abs(W/Q)
billiard balls - no sticking total energy is conserved
Efficiency of a Heat Engine
W=Fd=mad - direction of force must be same as direction of distance
Power from Force

34. 2nd right hand rule
F=Gm1m2/r²
on a solenoid wrap finger around direction of current - thumb will point in north pole direction
W=KEf-KEi
T=2pvl/g

35. Vectors in momentum
Fnet=rhofluid vfluid g -rho object vobject g where the volumes are usually equal
px and py are conserved
W=KEf-KEi
a=v²/r

36. U(gravitational) = -(Gm1m2/r)
rho=m/v
I=?q/?t
Force of Spring
Gravitational Potential Energy Anywhere

37. Net force/apparent weight broken done
Kinematic with Displacement - Velocity - Acceleration - and Time
L=n/2?
Fnet=rhofluid vfluid g -rho object vobject g where the volumes are usually equal
Adiabatic and isothermal processes ec= TH-TL/

38. a(centripetal) = v²/r
Fnet=Fb-Fg
Pin=Pout=Fin/Ain=Fout/Aout
Vf=Vi+ at - Vf²=Vi² +2ad - d=1/2 a t² +vit
Centripetal Acceleration

39. The three kinematics equations
Vf=Vi+ at - Vf²=Vi² +2ad - d=1/2 a t² +vit
Average Speed of each Molecule
Bernoulli Principal
Efficiency of a Heat Engine

40. Vsound
P=F/A=rho(g)h
?U=W - no heat added system (Q=0)
1ev=1.6E-19J
V=(331 +.6T) T=temp in Celsius

41. p = mv
Momentum
Constructive: 2t=m?+1/2? - Destructive: 2t=m?
V=constant - Q=added - C=added
?v=0 - w=0 area under the curve is zero

42. Impulse
Force of Spring
Kinematic with Velocity - Acceleration - and Time
f=mv²/r
J=?vm=F?t

43. Energy of gravitational attraction
Vf=Vi+ at - Vf²=Vi² +2ad - d=1/2 a t² +vit
Ug= Gm1m2/r
on a solenoid wrap finger around direction of current - thumb will point in north pole direction
Spring Potential Energy

44. Energy in a capacitor
V=Ed
Bernoulli Principal
1/2QV=U
T=2pvm/k

45. On a banked curve in circular motion - Fn in the y is
v3kT/m [mass per molecule] - v3RT/M [molar mass]
Power from Force
T=2pvl/g
Fny=FnCos?

46. F(buoy) = pVg
Archimedes Principle/Bouyancy
P=IV
Vab=Rated voltage-IR (r=internal resistance)
PE=mgh

47. Capacitors in parallel
Efficiency of a Heat Engine
V=constant - Q=added - C=added
Ideal Gas Law
V=added - I=constant - R= added

48. Bernoulli's Equation [Conservation of energy]
P1atm + 1/2rhoV1² + rhogh= P2atm + 1/2rhoV2² + rhogh
f=mv²/r
T=2pvm/k
L=n/4? has to be odd numbers

49. Capacitors in series
v3kT/m [mass per molecule] - v3RT/M [molar mass]
V=added - Q=constant - C= 1/C
W=KEf-KEi
px and py are conserved

50. K = (3/2)kT
Vab=Rated voltage-IR (r=internal resistance)
Average Molecular Kinetic Energy
t=Fr - force must be perpendicular to the moment arm and the axis of rotation
V=added - Q=constant - C= 1/C