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David Hudson Mechanics 2 Coursework Plumb Line Mechanics Experiment Making Assumptions and relating them to both the model and the experiment To be able to use the mechanics theory that I know, the following assumptions must be made, listed in order of importance. * All motion is vertical - Although the horizontal motion could be taken into account, it cannot really be measured with the equipment we have, and since it isn't wanted anyway it is best just to redo trials that result in some horizontal motion. This requires two further assumptions: o There is no spin - spin causes the movement of the ball in other directions. o The floor is perfectly horizontal - As it not being so would cause the ball to bounce in other directions (although in practise this can't be helped anyway) * There is no air resistance - As I cannot calculate air resistance using the theory I currently know, and the...

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