word equations Flashcards
kinetic energy
0.5 x mass x speed²
gravitational potential energy
mass x gravitational field strength x height
power in energy (topic 1)
work done/time taken
energy transferred/time taken
efficiency
useful energy output
total energy imput
elastic potential energy
0.5 x spring constant x extension²
change in thermal energy
mass x specific heat capacity x temperature change
charge flow
current x time
potential difference
current x resistance
total resistance
resistance 1 + resistance 2 …..
power (currentresistance)
current x potential difference
current² x resistance
energy transferred in electricity
power x time
charge flow x potential difference
density
mass
————
volume
wave speed
frequency x wavelength
image magnification
image height
———————
object height
weight
mass x gravitational field strength
work done (topic 1)
force x distance
force in spring
spring constant x extension
moment of a force
force x distance
pressure
force normal to a surface
—————————————
area of that surface
distance travelled
speed x time
acceleration
change in velocity
————————
time taken
momentum
mass x velocity
acceleration (long equation)
2acceleration x speed = final velocity² - initial velocity²