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. Elastic collision
F=kQ1Q2/r² BREAK INTO VECTORS
V=Ed
billiard balls - no sticking total energy is conserved
E=-N Change in flux/?t=Blv (v=velocity of the wire)

2. K = ½mv²
V=constant - I=added - R=1/r added
Kinetic Energy
Efficiency of a Heat Engine
E=F/q (point charge)=KQ1/r² BREAK INTO VECTORS

3. Engines (2 equations)
billiard balls - no sticking total energy is conserved
Bernoulli Principal
QH=QL +W and e=W/QH
Sum of all currents (I) entering=sum of all currents (I) leaving

4. Period for a spring in simple harmonic motion
P=mv (Kg m/s) or (N s)
F=Gm1m2/r²
T=2pvm/k
Kinematic with Displacement - Velocity - Acceleration - and Time

5. Basic thermo equation
Adiabatic and isothermal processes ec= TH-TL/
?U=Q + W - heat added= heat + work
V=W/Q=KQ/r NO VECTORS
v3kT/m [mass per molecule] - v3RT/M [molar mass]

6. F(spring) = -kx
P=Patm + rho g h
Force of Spring
F=ma
Average Speed of each Molecule

7. Hookes law
Force of Gravity
F=kx
V=vFt/(m/l)
F=Gm1m2/r²

8. v = v0 + at
General Pressure
on a solenoid wrap finger around direction of current - thumb will point in north pole direction
?U=W - no heat added system (Q=0)
Kinematic with Velocity - Acceleration - and Time

9. Absolute pressure
I=?q/?t
P=Patm + rho g h
J=?vm=F?t
Kavg=(3/2)kbT

10. Voltage (circuts)
V=IR
E=F/q (point charge)=KQ1/r² BREAK INTO VECTORS
?L=(coefficient of linear expansion)aLinitial?T
Ug= Gm1m2/r

11. Centripetal acceleration
PV=nRT - PV=N (# of molecules)kb (bozons constant)T
in series - measures current - low resistance
a=v²/r
moment arm - perpendicular distance from the force to the axis of rotation

12. Vectors in momentum
q=K?AT/L
Fny=FnCos?
a=v²/r
px and py are conserved

13. F(friction) = µN
Adiabatic and isothermal processes ec= TH-TL/
QH=QL +W and e=W/QH
Fnet=Fb-Fg
Force of Friction

14. Vsound
Force of Spring
shows magnetic field created by a current. Thumb in direction of the current - fingers show direction of field
V=(331 +.6T) T=temp in Celsius
moment arm - perpendicular distance from the force to the axis of rotation

15. Couloms law (force between two charged objects)
Pressure is constant ?P=0 w=-P?V
t=Fr - force must be perpendicular to the moment arm and the axis of rotation
F=kQ1Q2/r² BREAK INTO VECTORS
C=KepA/d

16. a(centripetal) = v²/r
Centripetal Acceleration
Efficiency of a Heat Engine
P1atm + 1/2rhoV1² + rhogh= P2atm + 1/2rhoV2² + rhogh
Vf=Vi+ at - Vf²=Vi² +2ad - d=1/2 a t² +vit

17. Change in pressure
?P=rho(g)?h
shows magnetic field created by a current. Thumb in direction of the current - fingers show direction of field
Vab=Rated voltage-IR (r=internal resistance)
V=vFt/(m/l)

18. U(spring) = ½kx²
E=-N Change in flux/?t=Blv (v=velocity of the wire)
Spring Potential Energy
Sum of all currents (I) entering=sum of all currents (I) leaving
R=rho L/A A=cross sectional area

19. Velocity of a wave
clockwise
V=?f
Power from Energy
P=IV

20. Net work
on a solenoid wrap finger around direction of current - thumb will point in north pole direction
Fnet=rhofluid vfluid g -rho object vobject g where the volumes are usually equal
W=KEf-KEi
Fgy=FgSin?

21. 2nd right hand rule
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
q=K?AT/L
?v=0 - w=0 area under the curve is zero

22. Potential energy
in series - measures current - low resistance
Average Speed of each Molecule
PE=mgh
?P=rho(g)?h

23. Negative torque
Adiabatic and isothermal processes ec= TH-TL/
Fgx=FgCos?
clockwise
Flux (in webers)=Bcos?A

24. The three kinematics equations
Vf=Vi+ at - Vf²=Vi² +2ad - d=1/2 a t² +vit
Work
T=2pr/v
Flux (in webers)=Bcos?A

25. Isovolumetric/isochoric
Average Molecular Kinetic Energy
T=2pvm/k
V=?f
?v=0 - w=0 area under the curve is zero

26. Net force/apparent weight broken done
Momentum
Fnet=rhofluid vfluid g -rho object vobject g where the volumes are usually equal
V=(331 +.6T) T=temp in Celsius
shows magnetic field created by a current. Thumb in direction of the current - fingers show direction of field

27. Kirchhoffs Junction rule
P1atm + 1/2rhoV1² + rhogh= P2atm + 1/2rhoV2² + rhogh
rho=m/v
Sum of all currents (I) entering=sum of all currents (I) leaving
Fgy=FgSin?

28. x = x0 + v0t + ½at²
Centripetal Acceleration
Vf=Vi+ at - Vf²=Vi² +2ad - d=1/2 a t² +vit
L=n/2?
Kinematic with Displacement - Velocity - Acceleration - and Time

29. P(avg) = W/?t
Fx=mv²/r=FnSin?
E=-N Change in flux/?t=Blv (v=velocity of the wire)
P1atm + 1/2rhoV1² + rhogh= P2atm + 1/2rhoV2² + rhogh
Power from Energy

30. F-NF or vice versa
Constructive: 2t=m?+1/2? - Destructive: 2t=m?
Pressure from Depth
Pin=Pout=Fin/Ain=Fout/Aout
P1atm + 1/2rhoV1² + rhogh= P2atm + 1/2rhoV2² + rhogh

31. Voltage across a battery terminal
Kavg=(3/2)kbT
px and py are conserved
Vab=Rated voltage-IR (r=internal resistance)
V=?f

32. Thermal expansion
?L=(coefficient of linear expansion)aLinitial?T
V=?f
W=KEf-KEi
T=2pvm/k

33. Bernoulli's Equation [Conservation of energy]
?U=W - no heat added system (Q=0)
P1atm + 1/2rhoV1² + rhogh= P2atm + 1/2rhoV2² + rhogh
rho=m/v
?P=rho(g)?h

34. P = Fvcos?
Power from Force
KE=1/2mv²
W is positive when work is done on the system - compression - W is negative when work is done by the system - expansion
W=Fd=mad - direction of force must be same as direction of distance

35. Force on a current carrying wire in a magnetic field
Kavg=(3/2)kbT
F=BIL
Fgx=FgCos?
?v=0 - w=0 area under the curve is zero

36. Total internal reflection
SG=rho object/10³
W is positive when work is done on the system - compression - W is negative when work is done by the system - expansion
n1sin?1=n2sin90
Average Molecular Kinetic Energy

37. p = mv
E=-N Change in flux/?t=Blv (v=velocity of the wire)
Momentum
Ug= Gm1m2/r
Thermal Conductivity

38. Dialectrics insulating sheet between plates
C=KepA/d
F=kx
sum of voltages must be zero
Power from Energy

39. Power - simple formula (mechanics)
P=W/T=FD/T=FV
in series - measures current - low resistance
L=n/2?
Kinematic with Displacement - Velocity - Acceleration - and Time

40. Banked curve - sum of the forces in the x
F=kx
sum of voltages must be zero
thumb in direction of proton - fingers in direction of magnetic field and palm will show you force
Fx=mv²/r=FnSin?

41. Velocity of sound in a strong
R=rho L/A A=cross sectional area
F=Bvsin?q
T=2pr/v
V=vFt/(m/l)

42. Electron volts
Pressure from Depth
Kinetic Energy
1ev=1.6E-19J
V=constant - Q=added - C=added

43. Voltage-charges formula (2)
?U=Q + W - heat added= heat + work
Efficiency of a Heat Engine
E=F/q (point charge)=KQ1/r² BREAK INTO VECTORS
V=W/Q=KQ/r NO VECTORS

44. Isobaric process
PV=nRT - PV=N (# of molecules)kb (bozons constant)T
Thermal Conductivity
L=n/4? has to be odd numbers
Pressure is constant ?P=0 w=-P?V

45. A1V1 = A2V2
Force of Spring
V=IR
Continuity
moment arm - perpendicular distance from the force to the axis of rotation

46. Electric field intensity
E=F/q (point charge)=KQ1/r² BREAK INTO VECTORS
KE=1/2mv²
Kinematic with Displacement - Velocity - Acceleration - and Time
PE=mgh

47. P + pgy + ½pv² = const.
Kavg=(3/2)kbT
Bernoulli Principal
n1sin?1=n2sin90
F=BIL

48. Period for circular motion
shows magnetic field created by a current. Thumb in direction of the current - fingers show direction of field
n1sin?1=n2sin90
a=v²/r
T=2pr/v

49. PE of a spring
Archimedes Principle/Bouyancy
PE=1/2kx²
?U=Q + W - heat added= heat + work
L=n/4? has to be odd numbers

50. heat flow through a window or door
Kavg=(3/2)kbT
Force of Friction
q=K?AT/L
W=KEf-KEi