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. Power - simple formula (mechanics)
Kinematic with Velocity - Acceleration - and Time
P=W/T=FD/T=FV
E=F/q (point charge)=KQ1/r² BREAK INTO VECTORS
P1atm + 1/2rhoV1² + rhogh= P2atm + 1/2rhoV2² + rhogh

2. Kinetic energy
V=added - Q=constant - C= 1/C
T=2pvl/g
KE=1/2mv²
Power from Energy

3. x = x0 + v0t + ½at²
Average Speed of each Molecule
V=W/Q=KQ/r NO VECTORS
Sum of all currents (I) entering=sum of all currents (I) leaving
Kinematic with Displacement - Velocity - Acceleration - and Time

4. Impulse
P1atm + 1/2rhoV1² + rhogh= P2atm + 1/2rhoV2² + rhogh
J=?vm=F?t
Thermal Conductivity
Constructive: 2t=m? - Destructive: 2t=m?+1/2?

5. Voltage-parallel plates
W=KEf-KEi
V=Ed
P=F/A=rho(g)h
C=KepA/d

6. Vsound
Q=CV
V=(331 +.6T) T=temp in Celsius
q=K?AT/L
shows magnetic field created by a current. Thumb in direction of the current - fingers show direction of field

7. Carnot engine
V=IR
Bernoulli Principal
F=kx
Adiabatic and isothermal processes ec= TH-TL/

8. P = P0 + pgh
Pressure from Depth
Archimedes Principle/Bouyancy
V=IR
Kinematic with Velocity - Acceleration - and Displacement

9. The three kinematics equations
Vf=Vi+ at - Vf²=Vi² +2ad - d=1/2 a t² +vit
Sum of all currents (I) entering=sum of all currents (I) leaving
n1sin?1=n2sin?2
W is positive when work is done on the system - compression - W is negative when work is done by the system - expansion

10. A1V1 = A2V2
T=2pvl/g
Continuity
?P=rho(g)?h
Kinematic with Velocity - Acceleration - and Time

11. Hookes law
F=kx
Efficiency of a Heat Engine
PE=1/2kx²
on a solenoid wrap finger around direction of current - thumb will point in north pole direction

12. Flux
273K and 1.013E5 pa
moment arm - perpendicular distance from the force to the axis of rotation
Flux (in webers)=Bcos?A
Fgy=FgSin?

13. e = abs(W/Q)
Efficiency of a Heat Engine
Fy=FnCos?-Fg
Force of Gravity
n1sin?1=n2sin90

14. Dialectrics insulating sheet between plates
Pressure is constant ?P=0 w=-P?V
C=KepA/d
Kavg=(3/2)kbT
I=?q/?t

15. Electric field intensity
F=kQ1Q2/r² BREAK INTO VECTORS
E=F/q (point charge)=KQ1/r² BREAK INTO VECTORS
Ug= Gm1m2/r
Fgx=FgCos?

16. Kirchhoffs loop rule [conservation of energy]
sum of voltages must be zero
Ft=0
F=ma
Average Speed of each Molecule

17. PV = nRT = NkT
V=?f
Ideal Gas Law
Pin=Pout=Fin/Ain=Fout/Aout
Q=CV

18. Current
I=?q/?t
clockwise
R=rho L/A A=cross sectional area
Fnet=rhofluid vfluid g -rho object vobject g where the volumes are usually equal

19. Kirchhoffs Junction rule
Sum of all currents (I) entering=sum of all currents (I) leaving
t=Fr - force must be perpendicular to the moment arm and the axis of rotation
Vf=Vi+ at - Vf²=Vi² +2ad - d=1/2 a t² +vit
Spring Potential Energy

20. Total internal reflection
Fnet=rhofluid vfluid g -rho object vobject g where the volumes are usually equal
n1sin?1=n2sin90
Fx=mv²/r=FnSin?
I=?q/?t

21. Simple density formula
Fnet=rhofluid vfluid g -rho object vobject g where the volumes are usually equal
R=rho L/A A=cross sectional area
E=-N Change in flux/?t=Blv (v=velocity of the wire)
rho=m/v

22. Bernoulli's Equation [Conservation of energy]
Bernoulli Principal
PV=nRT - PV=N (# of molecules)kb (bozons constant)T
E=-N Change in flux/?t=Blv (v=velocity of the wire)
P1atm + 1/2rhoV1² + rhogh= P2atm + 1/2rhoV2² + rhogh

23. Period for circular motion
?P=rho(g)?h
V=added - I=constant - R= added
T=2pr/v
PE=mgh

24. T = 1/f
Period in General
V=IR
Sum of all currents (I) entering=sum of all currents (I) leaving
a=v²/r

25. F(friction) = µN
T=2pr/v
P=F/A=rho(g)h
Force of Friction
1ev=1.6E-19J

26. natural frequencies in a closed tube
Fgy=FgSin?
L=n/4? has to be odd numbers
Vf=Vi+ at - Vf²=Vi² +2ad - d=1/2 a t² +vit
P=mv (Kg m/s) or (N s)

27. Period for a spring in simple harmonic motion
?v=0 - w=0 area under the curve is zero
T=2pvm/k
Centripetal Acceleration
Vab=Rated voltage-IR (r=internal resistance)

28. Voltage across a battery terminal
Pressure is constant ?P=0 w=-P?V
V=constant - I=added - R=1/r added
Vab=Rated voltage-IR (r=internal resistance)
Constructive: 2t=m? - Destructive: 2t=m?+1/2?

29. v = v(3RT)/M = v(3KT)/µ
E=-N Change in flux/?t=Blv (v=velocity of the wire)
Average Speed of each Molecule
Fgx=FgCos?
Constructive: 2t=m?+1/2? - Destructive: 2t=m?

30. Resistivity in a wire
273K and 1.013E5 pa
R=rho L/A A=cross sectional area
added in parallel - measures volts - high resistance
Kinematic with Velocity - Acceleration - and Displacement

31. K = ½mv²
Kinetic Energy
V=vFt/(m/l)
V=?f
E=-N Change in flux/?t=Blv (v=velocity of the wire)

32. Change in pressure
J=?vm=F?t
PV=nRT - PV=N (# of molecules)kb (bozons constant)T
billiard balls - no sticking total energy is conserved
?P=rho(g)?h

33. F-F or NF-NF
F=Bvsin?q
Constructive: 2t=m? - Destructive: 2t=m?+1/2?
Vab=Rated voltage-IR (r=internal resistance)
Momentum

34. Series Circuits
Sum of all currents (I) entering=sum of all currents (I) leaving
sum of voltages must be zero
Vab=Rated voltage-IR (r=internal resistance)
V=added - I=constant - R= added

35. Banked curve - sum of the forces in the y
thumb in direction of proton - fingers in direction of magnetic field and palm will show you force
px and py are conserved
Efficiency of an Ideal Engine
Fy=FnCos?-Fg

36. vrms (2 equations)
P=mv (Kg m/s) or (N s)
Fgx=FgCos?
?L=(coefficient of linear expansion)aLinitial?T
v3kT/m [mass per molecule] - v3RT/M [molar mass]

37. Net work
R=rho L/A A=cross sectional area
Force of Friction
V=constant - Q=added - C=added
W=KEf-KEi

38. Net force/apparent weight in forces
V=constant - Q=added - C=added
Fnet=Fb-Fg
T=2pvm/k
SG=rho object/10³

39. Power (circuts)
Kavg=(3/2)kbT
P=IV
V=(331 +.6T) T=temp in Celsius
1ev=1.6E-19J

40. H = (kA?T)/L
1/2QV=U
?v=0 - w=0 area under the curve is zero
Fb=mf g= rhof Vf g
Thermal Conductivity

41. Adiabatic process
C=KepA/d
Work
Momentum
?U=W - no heat added system (Q=0)

42. P(avg) = W/?t
Constructive: 2t=m?+1/2? - Destructive: 2t=m?
Power from Energy
q=K?AT/L
General Pressure

43. 3rd right hand rule
thumb in direction of proton - fingers in direction of magnetic field and palm will show you force
Q=CV
J=?vm=F?t
T=2pvl/g

44. Electron volts
rho=m/v
Ideal Gas Law
1ev=1.6E-19J
Flux (in webers)=Bcos?A

45. K = (3/2)kT
shows magnetic field created by a current. Thumb in direction of the current - fingers show direction of field
on a solenoid wrap finger around direction of current - thumb will point in north pole direction
Average Molecular Kinetic Energy
P=W/T=FD/T=FV

46. P = Fvcos?
Power from Force
v3kT/m [mass per molecule] - v3RT/M [molar mass]
moment arm - perpendicular distance from the force to the axis of rotation
T=2pvl/g

47. Vectors in momentum
?U=W - no heat added system (Q=0)
SG=rho object/10³
a=v²/r
px and py are conserved

48. U(gravitational) = -(Gm1m2/r)
Q=CV
Vf=Vi+ at - Vf²=Vi² +2ad - d=1/2 a t² +vit
Gravitational Potential Energy Anywhere
PV=nRT - PV=N (# of molecules)kb (bozons constant)T

49. 2nd right hand rule
V=added - I=constant - R= added
T=2pvm/k
on a solenoid wrap finger around direction of current - thumb will point in north pole direction
Vab=Rated voltage-IR (r=internal resistance)

50. Absolute pressure
Power from Energy
R=rho L/A A=cross sectional area
P=Patm + rho g h
J=?vm=F?t