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To be used for questions on geometry closely pertaining to physics. Includes differential geometry and Euclidean geometry. Do prefer the more specific tag differential-geometry for questions about differential geometry.

3 votes
2 answers
2k views

Determine the effective radius of a gear?

I'm trying to determine the gear radius using a ruler by $cm$ but I just don't know what to measure: 1- the length from gear center point to the end of the gear tooth ? Or 2- the length from gear …
Mohammad Fakhrey's user avatar
0 votes
2 answers
36k views

Finding the drag force (Air resistance force) for accelerated ball?

As you know if I want to find the force for an accelerated object I will use the law $F_o=ma$ so I can get the affecting force of it. But there is another force affecting against the object. It's the …
Mohammad Fakhrey's user avatar