... the activity three times to make the experiment as impartial as possible. We will then mark out a distance equal to the horizontal distance of the stairs on a flat road. We will time the same three volunteers running this distance and record them in a table. We are going to have them run the same distance on the ground as they are going horizontally on the stairs because the results obtained will be directly comparable and therefore easily analysed. We will, as with the last set, do this activity three times to make it as fair as possible. We will also do this activity with an additional 5kg load and record the times. Volunteer Mass (kg) Sammy 40 Charley 55 Jane 75 Prediction: We predict that the stairs experiment will require more work than the flat experiment. Also the volunteer with the greatest mass will do the most work, therefore using the most power. Adding a load will make the ...

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