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okay so our next example here of uh this is an example used as a DOT product here and this is a concept youamp;#39;ve probably encountered in physics this is the idea of work and what the heck is work well work is done whenever a force acts on an object and this object undergoes the displacement so it moves from one position to another under the influence of a force and the force doesnamp;#39;t actually have to produce this displacement the force just has to be acting on it while this object is moving where does the dot product come in well only the component of the force which acts in the same direction or in the opposite direction to the displacement does any work in the question so in terms of vectors here work is the dot product of our force and our displacement or F dot d okay and doing that dot product picks out the component of the force which is in the same direction as as the motion given by D I should just say here that f is of course our Force vector and D is our displacem