Can inertia be used as a force for propulsion?
In: 9
You could make a flywheel car. Spin up its flywheel at home, using cheap electricity, then drive it around, sapping energy from the flywheel, before getting back home.
You’ll lose most of the energy to losses in bearings, you couldn’t drive it very far, accelerating would be very difficult die to the vehicle wanting to gyroscopically remain stationary when you take off, and in a crash that huge flywheel would alive through everything and probably harm a lot of people. But… It could be done.
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