How Differential Gear Works

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I've been thinking about how cars' wheels are rigged up to move at different speeds in real life, and yet be able to be driven by a power source at the same time.

This video is the perfect answer to my question. The solution is ingenious and the video explains it really well!


My good friend +William Lin  further shared these videos on my Facebook post:




And finally a video which was referenced from this link on Reddit.

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