distance (m) = speed (m/s) x time (s)

Velocity is speed with a direction e.g. 10m/s Northwards

Acceleration (m/s²) = change in speed (m/s) / time taken (s)

Acceleration = (final velocity - initial velocity) / time taken (s) or a = v-u/t 

Balanced forces = constant velocity (this can be stationary)

Unbalanced forces (resultant) = change in velocity (+ve / –ve)

Every action force has an equal and opposite reaction force

Force (N) = mass (kg) x acceleration (m/s²)

The difference between opposite forces = resultant force. An object will accelerate / decelerate according to its size