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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. v = v(3RT)/M = v(3KT)/µ
Fx=mv²/r=FnSin?
Force of Friction
Average Speed of each Molecule
Adiabatic and isothermal processes ec= TH-TL/

2. Net force/apparent weight in forces
V=?f
L=n/2?
Fnet=Fb-Fg
V=added - I=constant - R= added

3. Energy of gravitational attraction
V=?f
Fb=mf g= rhof Vf g
PE=1/2kx²
Ug= Gm1m2/r

4. On an inclined plane - gravity in the y
Fgy=FgSin?
T=2pvl/g
?U=Q + W - heat added= heat + work
V=constant - I=added - R=1/r added

5. x = x0 + v0t + ½at²
f=mv²/r
Power from Force
Kinematic with Displacement - Velocity - Acceleration - and Time
1ev=1.6E-19J

6. F(friction) = µN
L=n/2?
billiard balls - no sticking total energy is conserved
Force of Friction
T=2pvl/g

7. Average kinetic energy
P1atm + 1/2rhoV1² + rhogh= P2atm + 1/2rhoV2² + rhogh
PV=nRT - PV=N (# of molecules)kb (bozons constant)T
Kinematic with Velocity - Acceleration - and Displacement
Kavg=(3/2)kbT

8. Basic thermo equation
shows magnetic field created by a current. Thumb in direction of the current - fingers show direction of field
?U=Q + W - heat added= heat + work
KE=1/2mv²
V=added - Q=constant - C= 1/C

9. F(gravity) = -(Gm1m2/r²)
P=Patm + rho g h
Force of Gravity
R=rho L/A A=cross sectional area
Ideal Gas Law

10. Simple force equation
F=ma
E=-N Change in flux/?t=Blv (v=velocity of the wire)
T=2pvl/g
V=added - I=constant - R= added

11. P = P0 + pgh
shows magnetic field created by a current. Thumb in direction of the current - fingers show direction of field
Pressure from Depth
Fgx=FgCos?
T=2pvl/g

12. Banked curve - sum of the forces in the x
1ev=1.6E-19J
Temperature is constant - ?U=0 - -Q=W
Fx=mv²/r=FnSin?
T=2pvl/g

13. Voltage across a battery terminal
Vab=Rated voltage-IR (r=internal resistance)
W=Fd=mad - direction of force must be same as direction of distance
Fnet=rhofluid vfluid g -rho object vobject g where the volumes are usually equal
1/2QV=U

14. Pascals principle
KE=1/2mv²
Pin=Pout=Fin/Ain=Fout/Aout
V=added - I=constant - R= added
rho=m/v

15. Centripetal force
Adiabatic and isothermal processes ec= TH-TL/
sum of voltages must be zero
f=mv²/r
W=Fd=mad - direction of force must be same as direction of distance

16. Power (circuts)
?P=rho(g)?h
Temperature is constant - ?U=0 - -Q=W
P=IV
E=-N Change in flux/?t=Blv (v=velocity of the wire)

17. Engines (2 equations)
P=mv (Kg m/s) or (N s)
QH=QL +W and e=W/QH
Ug= Gm1m2/r
Centripetal Acceleration

18. a(centripetal) = v²/r
T=2pvl/g
Fgx=FgCos?
Centripetal Acceleration
273K and 1.013E5 pa

19. Force buoyancy (2 formulas)
q=K?AT/L
Fb=mf g= rhof Vf g
P=F/A=rho(g)h
Momentum

20. Power - simple formula (mechanics)
v3kT/m [mass per molecule] - v3RT/M [molar mass]
P=W/T=FD/T=FV
?U=Q + W - heat added= heat + work
General Pressure

21. Voltmeter
W=Fd=mad - direction of force must be same as direction of distance
added in parallel - measures volts - high resistance
Force of Friction
Work

22. 2nd right hand rule
Efficiency of an Ideal Engine
Pressure from Depth
on a solenoid wrap finger around direction of current - thumb will point in north pole direction
P=F/A=rho(g)h

23. Simple harmonic motion - pendulum
T=2pvl/g
Pressure is constant ?P=0 w=-P?V
F=BIL
273K and 1.013E5 pa

24. Potential energy
n1sin?1=n2sin?2
PE=mgh
F=ma
Force of Spring

25. natural frequencies in a closed tube
Pin=Pout=Fin/Ain=Fout/Aout
L=n/4? has to be odd numbers
Average Speed of each Molecule
Momentum

26. v² = v0² + 2a(x-x0)
V=added - Q=constant - C= 1/C
Kinematic with Velocity - Acceleration - and Displacement
f=mv²/r
billiard balls - no sticking total energy is conserved

27. Voltage (circuts)
V=IR
Adiabatic and isothermal processes ec= TH-TL/
Fx=mv²/r=FnSin?
PE=mgh

28. Carnot engine
moment arm - perpendicular distance from the force to the axis of rotation
Adiabatic and isothermal processes ec= TH-TL/
Efficiency of a Heat Engine
A1V1=A2V2

29. Ammeter
Efficiency of an Ideal Engine
in series - measures current - low resistance
KE=1/2mv²
a=v²/r

30. Capacitance
Kinematic with Displacement - Velocity - Acceleration - and Time
Ideal Gas Law
counterclockwise
Q=CV

31. Negative torque
?U=Q + W - heat added= heat + work
E=-N Change in flux/?t=Blv (v=velocity of the wire)
V=constant - Q=added - C=added
clockwise

32. Adiabatic process
Fgy=FgSin?
P=Patm + rho g h
?U=W - no heat added system (Q=0)
added in parallel - measures volts - high resistance

33. A1V1 = A2V2
n1sin?1=n2sin90
P1atm + 1/2rhoV1² + rhogh= P2atm + 1/2rhoV2² + rhogh
Centripetal Acceleration
Continuity

34. e = (T(hot) - T(cold))/T(hot)
Force of Gravity
V=added - I=constant - R= added
T=2pvm/k
Efficiency of an Ideal Engine

35. torque
?U=Q + W - heat added= heat + work
t=Fr - force must be perpendicular to the moment arm and the axis of rotation
billiard balls - no sticking total energy is conserved
W=Fd=mad - direction of force must be same as direction of distance

36. Period for a spring in simple harmonic motion
?P=rho(g)?h
T=2pvm/k
1ev=1.6E-19J
F=kQ1Q2/r² BREAK INTO VECTORS

37. P + pgy + ½pv² = const.
W=KEf-KEi
Bernoulli Principal
P=Patm + rho g h
Gravitational Potential Energy Anywhere

38. Magnitude of gravitational forces between objects
Pin=Pout=Fin/Ain=Fout/Aout
A1V1=A2V2
F=Gm1m2/r²
Q=CV

39. Positive torque
counterclockwise
?U=W - no heat added system (Q=0)
273K and 1.013E5 pa
L=n/4? has to be odd numbers

40. PE of a spring
billiard balls - no sticking total energy is conserved
PE=1/2kx²
V=vFt/(m/l)
Fy=FnCos?-Fg

41. F-F or NF-NF
V=Ed
Constructive: 2t=m?+1/2? - Destructive: 2t=m?
Constructive: 2t=m? - Destructive: 2t=m?+1/2?
F=kx

42. Energy in a capacitor
Fnet=Fb-Fg
1/2QV=U
V=(331 +.6T) T=temp in Celsius
Fgy=FgSin?

43. Kirchhoffs loop rule [conservation of energy]
V=vFt/(m/l)
sum of voltages must be zero
?U=W - no heat added system (Q=0)
P=Patm + rho g h

44. F-NF or vice versa
PE=mgh
Pressure from Depth
Constructive: 2t=m?+1/2? - Destructive: 2t=m?
T=2pr/v

45. Vectors in momentum
px and py are conserved
Pin=Pout=Fin/Ain=Fout/Aout
T=2pvm/k
Constructive: 2t=m? - Destructive: 2t=m?+1/2?

46. Kinetic energy
?U=Q + W - heat added= heat + work
KE=1/2mv²
P=Patm + rho g h
E=-N Change in flux/?t=Blv (v=velocity of the wire)

47. Voltage-parallel plates
V=Ed
V=IR
P=F/A=rho(g)h
n1sin?1=n2sin?2

48. Capacitors in parallel
P=Patm + rho g h
Flux (in webers)=Bcos?A
in series - measures current - low resistance
V=constant - Q=added - C=added

49. P(avg) = W/?t
v3kT/m [mass per molecule] - v3RT/M [molar mass]
L=n/2?
Power from Energy
PE=mgh

50. EMF (two formulas)
P=mv (Kg m/s) or (N s)
PV=nRT - PV=N (# of molecules)kb (bozons constant)T
Kavg=(3/2)kbT
E=-N Change in flux/?t=Blv (v=velocity of the wire)