Speed, distance, time and work

Link speed, distance and time with one formula, then see how workers share a job. About 9 minutes, KS3 / GCSE.

What you will do

1. One idea, three forms. Speed, distance and time are one relationship: D = S × T. Cover the one you want in the triangle D / (S × T) and the formula appears.
2. Finding the speed. Divide the distance by the time. The unit of the answer is the unit of distance per unit of time.
3. Finding the distance. Multiply speed by time. Make sure the time is in the same unit as the speed.
4. Finding the time. Divide the distance by the speed.
5. Working together. Workers' rates add, not their times. If A does a job in 6 days, A does 16 of it per day.