Physics Equation Reference Sheet AWS

Physics Equation Reference Sheet Waves: v  f f 

Kinematics: x vavg  t

1 T

x  v0 t  12 at 2

Electrostatics and Circuits: F  qE

v  v0  at

v 2  v0  2ax 2

a avg 

v t

k qq F  e 21 2 r q I t V  IR P  IV

Forces:

P  I 2R

Fnet  ma

ac 

v2 r

Fg  mg

Thermodynamics:

mv2 r Gm1m2 Fg  r2

Fc 

TC  (TF  32) 5 9

TK  TC  273

Q  mcT U  Q  W (Work done by the system) U  Q  W (Work done on the system) Q T W   pV S 

p  Ft [m1v1  m2v2 ]initial  [m1v1  m2v2 ] final

Constants: Speed of light: c  3.0  10 m / s 8

Electric constant: ke  8.99  109 Nm2 / C 2 Universal Gravitational Constant:

G  6.67  10

Momentum: p  mv

11

2

Nm / kg

2

Acceleration due to gravity: g  9.8m / s 2

Energy: W  Fd W P t KE  12 mv2

PE g  mgh PEs  12 kx2

Variable Definitions Variable “Change in” Wave speed Wavelength Frequency Period

Symbol  v  f

Units -Meters/Second (m/s) Meters (m) Hertz (hz) Seconds (s)

Charge

T F q

Electric Field

E

Newtons/Coulomb (N/C)

Radius or Radial Distance

r

Meters (m)

Current

Amperes OR Amps (A)

Time

I t

Voltage

V

Volts (V)

Resistance

R P Q

Ohms (Ω)

m c

Kilograms (kg)

T L

Degrees Celsius ( C) or Kelvin (K)

Force

Power Heat Mass Specific Heat or Heat Capacity Temperature Latent Heat Change in Internal Energy Work Change in Entropy

U W S

Newtons (N) Coulombs (C)

Seconds (s)

Watts (W) Joules (J) Joules/kgK (J/kgK) OR

e

g C

Joules/kg (J/kg) Joules (J) Joules (J) Joules/Kelvin (J/K)

Pressure

p

Volume

Spring Constant

V x a v k

Momentum

p

Kilogram-meters/second (kgm/s)

Distance

d

Meters (m)

Change in position, Displacement Acceleration Velocity

Kinetic Energy Potential Energy Height

KE PE h

Pascals (Pa) OR Newtons/meters2 (N/m2) Meters3 (m3) Meters (m) Meters/seconds2 (m/s2) Meters/second (m/s) Newtons/meter (N/m)

Joules (J) Joules (J) Meters (m)

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