Measurements

For this value...

(symbol)

...use this unit of measurement

Speed and velocity

v

metres per second (m/s) (scientifically preferred)
kilometre per hour (km/h)
miles per hour (mph)

Acceleration

a

metres per second per second (m/s²)

Gravitation Acceleration

g

metres per second per second (m/s²)
(on Earth, this value is equal to approximately 9.8 m/s²)

Mass

m

kilograms (kg) (scientifically preferred)
grams (g)

Weight

w

newtons (N)

Force

F

newtons (N).

Energy (kinetic or potential)

KE, GPE or EPE

joules (J)

Work Done

W

joules (J)

Power

watts (W)