Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
32 Cards in this Set
- Front
- Back
|
density (kg/m3)
|
= mass(kg)/volume (m3)
|
|
|
acceleration(m/s2) |
= change in speed (m/s) /time(s)
|
|
|
force (N)
|
=mass (kg) x acceleration (m/s2)
|
|
|
work done (J)
|
= force (N) x distance (m) (along the line of action of the force)
|
|
|
force exerted by a spring(N)
|
= extension(m) x spring constant(N/m)
|
|
|
in a gravity field: potential energy (J)
|
= mass (kg)x height (m) x gravitational field strength, g (N/kg)
|
|
|
moment of a force (Nm)
|
= force (N) x distance (m) (normal to direction of the force)
|
|
|
potential difference (V)
|
= current (A) x resistance
|
|
|
thermal energy for a change in state
|
= mass (kg) x specific latent heat
|
|
|
pressure due to a column of liquid (Pa)
|
= height of column (m) x density of liquid (kg/m3) x g (N/kg)
|
|
|
energy transferred in stretching (J)
|
= 0.5 x spring constant(N/m) x (extension (m))2
|
|
|
potential difference across primary coil (V) / potential difference across secondary coil (V)
|
= number of turns in primary coil / number of turns in secondary coil
|
|
|
distance travelled (m)
|
= speed (m/s) x time (s)
|
|
|
kinetic energy (J)
|
= 0.5 x mass (kg) x (speed (m/s))2
|
|
|
momentum (kgm/s)
|
= mass (kg) x velocity (m/s)
|
|
|
power(W)
|
= work done(J) / time(s)
|
|
|
gravity force (N)
|
= mass (kg) x gravitational field strength, g (N/kg)
|
|
|
pressure (Pa)
|
= force normal to a surface (N) / area of that surface (m2)
|
|
|
charge flow (C)
|
= current (A) x time (s)
|
|
|
change in thermal energy
|
= mass (kg) x specific heat capacity x change in temperature
|
|
|
for gases: pressure (Pa) x volume (m3)
|
= constant (for a given mass of gas and at a constant temperature)
|
|
|
(final velocity (m/s))2 - (initial velocity (m/s))2
|
= 2 x acceleration (m/s2) x distance(m)
|
|
|
force on a conductor (at right angles to a magnetic field) carrying a current (N)
|
= magnetic field strength (T) x current (A) x length (m)
|
|
|
potential difference across primary coil (V) x current in primary coil (A)
|
= potential difference across secondary coil (V) x current in secondary coil (A)
|
|
|
Energy transferred |
= charge x potential difference |
|
|
Power |
= potential difference x current |
|
|
Power |
= current^2 x resistance |
|
|
Energy transferred |
= power x time |
|
|
Wave speed |
= frequency x wavelength |
|
|
Efficiency |
= useful energy output transfer/input energy transfer |
|
|
Force |
= change in momentum / time |
|
|
(Moments): input force / output force |
= distance of output force from pivot / distance of input force from pivot |
