On the locus formed by the maximum heights of projectile motion with air resistance

Details On the locus formed by the maximum heights of projectile motion with air resistance On the locus formed by the maximum heights of projectile motion with air resistance

2010-01-04

arxiv.org/abs/1001.0602v2

European Journal of Physics 31 (2010) 1319-1329

Physics

Classical Physics

7 pages, 6 color eps figures. Synchronous curve added. Typos and style corrected.

Scientific paper

We present an analysis on the geometrical place formed by the set of maxima of the trajectories of a projectile launched in a media with linear drag. Such a place, the locus of apexes, is written in term of the Lambert $W$ function in polar coordinates, confirming the special role played by this function in the problem. In order to characterize the locus, a study of its curvature is presented in two parameterizations, in terms of the launch angle and in the polar one. The angles of maximum curvature are compared with other important angles in the projectile problem. As an addendum, we find that the synchronous curve in this problem is a circle as in the drag-free case.

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