Examples A bar model can represent speed, distance and time. An object moves at a speed of 20 kilometres per hour (km/h) for 6 hours. How far does it travel?

What is speed? Definition. Units of speed. Calculate one of distance, speed or time given the other two variables.

For example, if a car travels distance (d) at a speed of x km/hr and returns at y km/hr, then the above formula can be used to calculate the average speed. • When time is constant: ...

But using speed to calculate distance leaves no way to calculate any “peculiar motion” the galaxy might have in addition to the motion that is part of the overall expansion.