equations Flashcards
Density (kg/m^3) =
Volume(Mass(kg)/volume(m^3)
Distance Travelled (M) =
speed(m/s) * Time (s)
acceleration (m/s²) =
change in velocity (m/s)/time (s)
kinetic energy (J) =
0.5 * mass(kg) * (speed(m/s)²
force (N) =
mass (kg) * acceleration (m/s²)
momentum (kgm/s) =
mass(kg) * velocity (m/s)
work done (j) =
force (N) * distance (m) (along the line of action of the force)
power (w)v =
work done (J) / time (S)
force exerted by a spring (N) =
extension (M) * Spring constant (n/m)
gravity force (N) =
mass (KG) * gravitational field strength, g (N/kg)
(in a gravity field) Potential energy (J) =
mass (kg) * height (m) * Gravitaitonal field stength, g (n/kg)
pressure (Pa) =
force normal to a surface (N) / area of that surface (m²)
moment of a force (Nm) =
force (N) * distance (m) (normal to direction of the force)
charge flow (C) =
current (A) * time (s)
potential difference (V) =
current (A) * Resistance (ohms)
energy transferred (J) =
Charge (C) * potential difference (V)
power (W) =
potential difference (V) * current (A) = (current (A))²* Resistance (ohms)
energy transferred (J, kWh) =
power (W,kW) * time (s, h)
wave speed (m/s) =
frequency (Hz) */ wavelength (m)
effciency =
useful output energy transfer (j) / input energy transfer (j)
change in thermal energy (j) =
mass (kg) * specific heat capacity (J/kg degrees C) * Change in temperature (degrees C )
thermal energy for a change in state (J) =
mass (kg) * specific latent heat (J/KG
/for gasses: pressure (Pa) * Volume (m^3)=?
constant (for a given mass of gas ad at a constant tempreature
pressure due to a column of liquid (Pa)=
height of column (m) * density of liquid (kg/m^3) * g(n/kg)
(final velocity(m/s)) ² -(initial velocity(m/s)) ² =?
2 8 acceleration (m/s ² ) * distance (m)
energy transferred in stretching (j)=
0/5 * spring constant (N/m) * (extension (m)) ²
force on a conductor (at right angles to a magnetic field) carrying a current (N)=
magnetic field strength (T) * Current (A) * Length (m)
potential difference across primary coil (V) / potential difference across secondary coil (V)=
number of turns across primary coil / number of turns in secondary coil
potential difference across primary coil (V) * current in primary coil (A) =?
potential difference across secondary coil (V) */ current in secondary coil (A)
