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Provost, J.-P.; Bracco, C. – European Journal of Physics, 2009
Proceeding like Newton with a discrete time approach of motion and a geometrical representation of velocity and acceleration, we obtain Kepler's laws without solving differential equations. The difficult part of Newton's work, when it calls for non-trivial properties of ellipses, is avoided by the introduction of polar coordinates. Then a simple…
Descriptors: Motion, Secondary School Teachers, Equations (Mathematics), Mathematics Instruction