Four vehicles travelled on a road. What can you deduce from the times that they met?
Brian swims at twice the speed that a river is flowing, downstream
from one moored boat to another and back again, taking 12 minutes
altogether. How long would it have taken him in still water?
At Holborn underground station there is a very long escalator. Two
people are in a hurry and so climb the escalator as it is moving
upwards, thus adding their speed to that of the moving steps. ...
How many steps are there on the escalator?
This problem rests on the student visualising the motion from a
graphical expression of the distance-time data.
Asking for a result in units other than those given on a graph
scale involves a little problem solving but mostly relies on an
ability to see the same quality (speed) expressed in more than one
way (m/s or mph)