Seite - 117 - in Programming for Computations – Python - A Gentle Introduction to Numerical Simulations with Python 3.6, Band Second Edition

5.4 MakingOurOwnModule 117 DESCRIPTION Module for computing vertical motion characteristics for a projectile. FUNCTIONS max_height(v0) Compute maximum height reached, given the initial vertical velocity v0. Assume negligible air resistance. time_of_flight(v0) Compute time in the air, given the initial vertical velocity v0. Assume negligible air resistance. y(v0, t) Compute vertical position at time t, given the initial vertical velocity v0. Assume negligible air resistance. We recognize thedocstrings in theprintoutandshould realize that it is agood idea tokeep thosedocstrings informative. With the following interactive session, comparing the answers to hand calcula- tions (using the formulasand a calculator),we confirm that the modulenow seems toworkas intended, In [1]: import vertical_motion as vm In [2]: vm.y(v0=5, t=0.6) Out[2]: 1.2342 In [3]: vm.time_of_flight(v0=5) Out[3]: 1.019367991845056 In [4]: vm.max_height(v0=5) Out[4]: 1.27420998980632 We now have a useful version of our own vertical motion module, from which imports work just like from built-in modules. Still, there is room for useful modifications,aswe will turn tonext.