Test your basic knowledge |

AP Physics B: Formulas

Instructions:

Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can study here.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

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. Ideal gas laws
T=2pr/v
Average Molecular Kinetic Energy
PV=nRT - PV=N (# of molecules)kb (bozons constant)T
273K and 1.013E5 pa

2. v = v(3RT)/M = v(3KT)/µ
Average Speed of each Molecule
?P=rho(g)?h
T=2pvm/k
T=2pvl/g

3. Isovolumetric/isochoric
Constructive: 2t=m?+1/2? - Destructive: 2t=m?
Kavg=(3/2)kbT
?v=0 - w=0 area under the curve is zero
SG=rho object/10³

4. W
W=KEf-KEi
Kinematic with Velocity - Acceleration - and Time
counterclockwise
W is positive when work is done on the system - compression - W is negative when work is done by the system - expansion

5. heat flow through a window or door
F=Gm1m2/r²
moment arm - perpendicular distance from the force to the axis of rotation
F=kx
q=K?AT/L

6. Pressure (2 formulas)
Centripetal Acceleration
P=F/A=rho(g)h
C=KepA/d
E=-N Change in flux/?t=Blv (v=velocity of the wire)

7. Voltage-parallel plates
t=Fr - force must be perpendicular to the moment arm and the axis of rotation
V=W/Q=KQ/r NO VECTORS
T=2pvl/g
V=Ed

8. Vsound
px and py are conserved
Constructive: 2t=m? - Destructive: 2t=m?+1/2?
Vab=Rated voltage-IR (r=internal resistance)
V=(331 +.6T) T=temp in Celsius

9. Power - simple formula (mechanics)
P=W/T=FD/T=FV
P1atm + 1/2rhoV1² + rhogh= P2atm + 1/2rhoV2² + rhogh
Average Speed of each Molecule
Kinematic with Velocity - Acceleration - and Displacement

10. v = v0 + at
n1sin?1=n2sin90
V=Ed
Fgx=FgCos?
Kinematic with Velocity - Acceleration - and Time

11. Force buoyancy (2 formulas)
V=added - I=constant - R= added
Fb=mf g= rhof Vf g
V=added - Q=constant - C= 1/C
Efficiency of an Ideal Engine

12. A1V1 = A2V2
Constructive: 2t=m?+1/2? - Destructive: 2t=m?
V=W/Q=KQ/r NO VECTORS
Continuity
Spring Potential Energy

13. F(spring) = -kx
Fny=FnCos?
Force of Spring
sum of voltages must be zero
L=n/4? has to be odd numbers

14. Impulse
F=Bvsin?q
PV=nRT - PV=N (# of molecules)kb (bozons constant)T
?v=0 - w=0 area under the curve is zero
J=?vm=F?t

15. Voltage-charges formula (2)
F=Bvsin?q
T=2pr/v
V=W/Q=KQ/r NO VECTORS
J=?vm=F?t

16. H = (kA?T)/L
Fgx=FgCos?
Fnx=FnSin?
Fny=FnCos?
Thermal Conductivity

17. Carnot engine
L=n/4? has to be odd numbers
Adiabatic and isothermal processes ec= TH-TL/
C=KepA/d
Force of Spring

18. Electric field intensity
P=mv (Kg m/s) or (N s)
Ug= Gm1m2/r
E=F/q (point charge)=KQ1/r² BREAK INTO VECTORS
V=?f

19. 2nd right hand rule
QH=QL +W and e=W/QH
T=2pvm/k
on a solenoid wrap finger around direction of current - thumb will point in north pole direction
V=constant - I=added - R=1/r added

20. x = x0 + v0t + ½at²
Vab=Rated voltage-IR (r=internal resistance)
P=mv (Kg m/s) or (N s)
counterclockwise
Kinematic with Displacement - Velocity - Acceleration - and Time

21. Pascals principle
Efficiency of a Heat Engine
Temperature is constant - ?U=0 - -Q=W
Pin=Pout=Fin/Ain=Fout/Aout
Fnet=Fb-Fg

22. Isobaric process
Pressure is constant ?P=0 w=-P?V
273K and 1.013E5 pa
J=?vm=F?t
Ft=0

23. Period for circular motion
PV=nRT - PV=N (# of molecules)kb (bozons constant)T
V=IR
T=2pr/v
Continuity

24. Thermal expansion
?L=(coefficient of linear expansion)aLinitial?T
L=n/4? has to be odd numbers
V=constant - I=added - R=1/r added
thumb in direction of proton - fingers in direction of magnetic field and palm will show you force

25. Work - simple formula
SG=rho object/10³
Efficiency of an Ideal Engine
W=Fd=mad - direction of force must be same as direction of distance
1/2QV=U

26. Specific gravity
SG=rho object/10³
P=F/A=rho(g)h
Force of Gravity
Kinetic Energy

27. PE of a spring
Kinematic with Velocity - Acceleration - and Time
PE=1/2kx²
SG=rho object/10³
P=Patm + rho g h

28. F(friction) = µN
R=rho L/A A=cross sectional area
F=ma
J=?vm=F?t
Force of Friction

29. torque
moment arm - perpendicular distance from the force to the axis of rotation
SG=rho object/10³
Power from Force
t=Fr - force must be perpendicular to the moment arm and the axis of rotation

30. 1st right hand rule
Pin=Pout=Fin/Ain=Fout/Aout
V=constant - I=added - R=1/r added
shows magnetic field created by a current. Thumb in direction of the current - fingers show direction of field
Fx=mv²/r=FnSin?

31. The three kinematics equations
P=mv (Kg m/s) or (N s)
in series - measures current - low resistance
W=KEf-KEi
Vf=Vi+ at - Vf²=Vi² +2ad - d=1/2 a t² +vit

32. Series Circuits
Vf=Vi+ at - Vf²=Vi² +2ad - d=1/2 a t² +vit
F=BIL
V=added - I=constant - R= added
T=2pvl/g

33. snells law
n1sin?1=n2sin?2
Efficiency of an Ideal Engine
C=KepA/d
Kavg=(3/2)kbT

34. Total internal reflection
Kinematic with Displacement - Velocity - Acceleration - and Time
Kinematic with Velocity - Acceleration - and Displacement
Kinematic with Velocity - Acceleration - and Time
n1sin?1=n2sin90

35. P(avg) = W/?t
Power from Energy
P=Patm + rho g h
Fnet=Fb-Fg
F=BIL

36. a(centripetal) = v²/r
W is positive when work is done on the system - compression - W is negative when work is done by the system - expansion
F=Bvsin?q
a=v²/r
Centripetal Acceleration

37. Bernoulli's Equation [Conservation of energy]
Kavg=(3/2)kbT
P1atm + 1/2rhoV1² + rhogh= P2atm + 1/2rhoV2² + rhogh
L=n/4? has to be odd numbers
Adiabatic and isothermal processes ec= TH-TL/

38. Negative torque
Bernoulli Principal
clockwise
Adiabatic and isothermal processes ec= TH-TL/
Flux (in webers)=Bcos?A

39. Simple force equation
Force of Spring
F=ma
Efficiency of a Heat Engine
Pin=Pout=Fin/Ain=Fout/Aout

40. Simple harmonic motion - pendulum
T=2pvl/g
P=mv (Kg m/s) or (N s)
P=W/T=FD/T=FV
Constructive: 2t=m? - Destructive: 2t=m?+1/2?

41. P = Fvcos?
Average Molecular Kinetic Energy
QH=QL +W and e=W/QH
v3kT/m [mass per molecule] - v3RT/M [molar mass]
Power from Force

42. Net force/apparent weight in forces
T=2pvm/k
Kinetic Energy
Constructive: 2t=m?+1/2? - Destructive: 2t=m?
Fnet=Fb-Fg

43. Period for a spring in simple harmonic motion
273K and 1.013E5 pa
clockwise
Pressure from Depth
T=2pvm/k

44. On an inclined plane - gravity in the y
F=kQ1Q2/r² BREAK INTO VECTORS
Pin=Pout=Fin/Ain=Fout/Aout
Fgy=FgSin?
P=mv (Kg m/s) or (N s)

45. Vectors in momentum
V=?f
px and py are conserved
V=added - I=constant - R= added
C=KepA/d

46. T = 1/f
moment arm - perpendicular distance from the force to the axis of rotation
Thermal Conductivity
?U=Q + W - heat added= heat + work
Period in General

47. On a banked curve in circular motion - Fn in the y is
Fny=FnCos?
px and py are conserved
T=2pvl/g
QH=QL +W and e=W/QH

48. W = F?rcos?
T=2pvm/k
Pressure is constant ?P=0 w=-P?V
?U=Q + W - heat added= heat + work
Work

49. Centripetal force
f=mv²/r
Bernoulli Principal
W=Fd=mad - direction of force must be same as direction of distance
F=Bvsin?q

50. vrms (2 equations)
Bernoulli Principal
v3kT/m [mass per molecule] - v3RT/M [molar mass]
V=?f
Vf=Vi+ at - Vf²=Vi² +2ad - d=1/2 a t² +vit