A storage device keeps energy by spinning a heavy disc fast. It is called a:
AFlypaper
BFlywheel
CFlyleaf
DFlyover
Answer & Solution
Correct answer: B. Flywheel
1. The energy is stored as rotation.
2. A massive disc holds a lot of it.
3. That device is a flywheel.
_Source: OpenStax University Physics Volume 1, Chapter 10, Fixed-Axis Rotation._
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