Year 9 Physics equations

kinetic energy =

½ x mass x (velocity)²

elastic potential energy =

½ x spring constant x (extension)²

gravitational potential energy =

mass x gravitational field strength x height

power =

energy transferred / time

power =

work done / time

weight =

mass x gravitational field strength

work done =

force x distance moved in direction of force

force =

spring constant x extension

moment of a force =

force x distance (normal to direction of force)

pressure =

force / area

pressure due to a column of liquid =

height of column x density of liquid x gravitational field strength

distance travelled =

speed / time

acceleration =

change in velocity / time taken

uniform acceleration =

(final velocity)² - (initial velocity)² = 2 x acceleration x displacement

resultant force =

mass x acceleration

momentum =

mass x velocity

force =

change in momentum / time