Three people take part in a tough cross-country run. One person is dressed in a waterproof mackintosh, the second is dressed in a suit of armour, and the third is a mummy wrapped in bandages. The person in the armour finds that it’s too heavy to move about in. He drops out of the race. The runner in bandages can’t cope with the river, leaving the runner in the mackintosh to win the race.
The question posed at the end is: how did the mackintosh help its wearer to win the race?
See the accompanying teachers’ notes by primary science adviser John Stringer for further notes explaining the science behind the problems, and suggested extension activities.