Speed is a measure of how far an object can travel in a certain amount of time. We often use kilometres per hour in everyday life. However, scientists generally use metres per secondas it is a more useful measure of speed. To calculate speed, we need to know two variables: distance travelled and time taken to travel that distance.

To calculate speed, scientists use the formula:

Speed (v) = d (change in distance) ____________________

t (change in time)

Velocity Equation

v = velocity - speed with direction (ms-1 or m/s)

d = distance (m)

t = time (s)

	Created by Kate White over 8 years ago

SciPad Notes and Class Notes for the Mechanics Unit.