Level 2

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weight

mass x gravitational field strength

work done

force x distance along the line of action of the force

force applied to a spring

spring constant x extension

moment of a force

force x distance normal to direction of force

pressure

force normal to a surface / area of that surface

distance travelled

speed x time

acceleration

change in velocity / time taken

resultant force

mass x acceleration

momentum

mass x velocity

kinetic energy

0.5 x mass x speed x speed

gravitational potential energy

mass x gravitational field strength x height

power

energy transferred / time

power (2)

work done / time

efficiency

useful energy output / total energy output

efficiency (2)

total power output / total power input

wave speed

frequency x wavelength

charge flow

current x time

potential difference

current x resistance

power (3)

current x current x resistance

power (4)

potential difference x current

energy transferred

power x time

energy transferred (2)

charge flow x potential difference

density

mass / volume