int R, either within orwithout the curve, two straight lines be drawn parallel to twogiven directions, and cutting the curve in M, M and Q, Qrespectively, then the ratio of the rectangles RM. EM: RQ . RQ will be independent of the position of the point R. (l) In the parabola. Through the point R… … In like manner for any other chord MEM we shouldhave, RM .EM = 4&P SP RMJiM METHOD OF FINDING CENTRIPETAL FORCES. 377 Now the points P and P remain the same as long as thechords are drawn parallel to fixed directions: hence the pro-position is true. (2) In the ellipse. Through the centre C…
