Answer on Mechanics | Relativity Question for darcelle
(2) You have to find distance within endpoints at the start of the motion and at the finish of it respectively. If start point has the coordinates (x1, y1) and the finish point - (x2,y2),
D2 = (x2-x1)2 + (y2-y1)2
(3) You have to obtain the vector which modulus equals to the distance within endpoints of the motion and direction can be estimated as (x2-x1, y2-y1).
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