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What affects the stopping distance of a vehicle? Aim: - To carry out an experiment to show us what affects the stopping distance of a small wooden trolley when it is pulled back a certain distance by an elastic catapult and has varying brake force. I could have chosen many different variables from the following- weight of the brakes, weight of the trolley, mass of the trolley, gradient of the slope, air resistance, elasticity of the catapult, the distance the catapult is pulled back. However I decided to vary the weight acting on the brakes - therefore gradually increasing the force and resistance on the brakes and making the trolley stop in shorter distance. The rest of these possible variables will stay constant and unchanged. I decided not to use a variable which would mean we had to record the time because this would be more difficult to record, therefore more...

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