Physics Formulae

HideShow resource information
  • Created by: hibawot
  • Created on: 14-05-14 15:34

Forces and Motion

• Speed (m/s) = Distance ÷ Time

• Acceleration (m/s ) = Change in Speed ÷ Time

• Weight (N) = Mass (kg) x Gravity

w = mg

• Force = Mass x Acceleration

F = ma

• Moment (Nm) = Force (N) x Distance to Pivot (m)

• Orbital Speed = 2 x π x Orbital Radius ÷ Time

1 of 7

Electricity

• Electrical Power (in Watts) = Current x Voltage 

P = IV

• Energy Transferred (in Joules) = Current x Voltage x Time

E = IVt

• Voltage = Current x Resistance (Ohms)

V = IR

• Charge (in Coulumbs) = Current x Time

Q = IT

2 of 7

Waves

• Speed (m/s) = Frequency (in Hz) x Wavelength (m)

v = f x λ

• Sin C = 1 ÷ Refractive Index 

sin C = 1 ÷ n

• Refractive Index = Sin Incident Ray ÷ Sin Refracted ray 

n = sin i ÷ sin r

3 of 7

Energy Transfer

• Efficiency = Useful Output ÷ Total Energy Input

• Work Done (in Joules) = Force x Distance

W = Fd

• Power (in Watts or Joules/s) = Work done ÷ Time taken

W = Pt

• GPE = Distance x G x Height

GPE = mgh

4 of 7

Solids, Liquids & Gases

• Density (in kg/m cubed = Mass ÷ Volume

m = pV

• Pressure (in Pascals or N/m squared) = Force ÷ Area

F = pA

• Pressure Difference (in Pascals) = Height x Density x G

p = hpg

• p1 V1 = p2 V2

5 of 7

Magnetism - Fleming's Left Hand Rule

.

6 of 7

Radioactivity and Particles

Alpha Emission:

  • Mass number - 4
  • Atomic number - 2

Beta Emission:

  • Mass number doesnt change
  • Atomic number + 1

Gamma Emission: No change, just waves of energy

7 of 7

Comments

No comments have yet been made

Similar Physics resources:

See all Physics resources »See all All Topics resources »