physics formulas

avarage speed

distance/time and measures in m/s

velocity

displacement/ time and measured in m/s

acceleration

change in velocity/time

force

mass x acceleration and meausre in N

pressure

force/area and measured in pascals

weight

mass x gravitational field strengh N

density

mass/ volume

hookes law

spring constant x extention

moment of a force

force x perpendicualar distance from pivot

mechanical work

force x distance (J)

work done

weight x verticl height the obejct is lifted

power

work /time

kinetic energy

½ x mass x velocity(2) (J)

gravitational potential energy

mass x gravitational field strengh x height

effiency

useful energy output/ total energy input x 100

time period of a wave

1/frequency

wave speed

freequency x wavelengh

echo

2xdistance from obeject/ time

snells law

angle of incidence/ angle of refraction

current (a)

charge/ time

voltage

current x resistance

r2/r1 (comparing resitances of conductors of different lenghs)

(L2/A2)/(L1/A1)

electrical power

current X voltage or current(2) x resistance

energy transferred

current x voltage x time

resistors in series

R1+R2+…

resistors in parallel

1/R1 +1/R2+…