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To drive a typical car at 40 mph on a level road for one hour requires about 3.2x10⁷ J of energy. suppose we tried to store this much energy in a spinning, solid, uniform, cylindrical flywheel. a large flywheel cannot be spun too fast or it will fracture. if we used a flywheel of diameter 2 m and mass 278 kg. What angular speed would be required to store 3.2x10⁷ J?
Sagot :
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