Formulas Flashcards
Velocity
displacement / time .
v = s/t
average speed
total distance / total time
displacement
initial velocity x time + ½ x acceleration x (time)²
acceleration
change in speed / change in time
final velocity²
initial velocity² + 2 (acceleration)(displacement)
Weight (N)
Mass (KG) x Gravitational field strength (9.8m/s²)
Moment (Nm)
Force x Distance
Force (N)
Mass (KG) x Acceleration (m/s²)
Density(kg/m³)
Mass(KG) / Volume³
Impulse
(mass x final velocity) - (mass x initial velocity)
Momentum (kg m/s)
Mass x Velocity
Work done (Joules)
Force (N) x Distance (m)
Power (Watts)
Work done (J) / Time (s)
Power
Force x Velocity
Pressure (Pa)
Force (N) / Area (m²)
Pressure in liquid (Pa)
Density x Gravitational field strength x Height
Gravitational Potential Energy
Mass x Gravitational Field Strength x Height
Pressure (Pa) x Volume (m³)
Constant - for fixed mass of gas at constant temperature
Q = mcθ : Energy (J)
mass (kg) × specific heat capacity (J/kg°C-1) × temperature change (°C)
Wave speed (m/s)
Frequency (Hz) x Wave Length (m)
Frequency (Hz)
1 / Period (s)
Refractive Index
speed of light in vacuum / speed of light in material
Electromotive force
Work Done / Charge
Current (Amps)
Charge (Coulombs) / Time (s)
Potential Difference (Volts)
Work done or Energy (J) / Charge (Coulombs)
Resistance (Ω)
Voltage (Volts) / Current (Amps)
Power (Watts)
Current (Amps) x Voltage (Volts)
Energy (J)
Current (Amps) x Voltage (Volts) x Time (s)
Average orbital speed
2𝜋 × average radius of the orbit (m) / orbital period (s)
Distance of galaxy (m) / Speed from us (m/s)
1 / Hubble’s Constant (/s)
Hubble’s Constant
Speed of earth moving away (m/s) / Distance from earth (m)
