Downloading Newton-II 3.5 for Mac from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this app available. This Mac application was originally produced by University Wuerzburg - Germany. The application is included in Education Tools. We recommend checking the downloaded files with any free antivirus.
From the developer:
Newton-II is a program for solving mechanical equations of motions numerically. The equations can be parameterized for interactive investigations of the motions. The according solutions are displayed immediately in a diagram.
The differential equations (DEQs) are programmed to calculate the time dependence of the velocitiy v(t) of a point of mass from the given acceleration a. Then the location s(t) is calculated from v(t).
You may want to check out more Mac applications, such as Analytics to Earth or TreeView X, which might be related to Newton-II.
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