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How does a wind-up toys without a spring work?

April 26, 2017spring TOYS wind-up

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How does a wind-up toys without a spring work?

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If there was no spring it would need some other kind of energy storage device. For example, a pendulum clock uses the potential energy of the pendulum in order to store the clocks energy. This is probably not the case in a toy, but it still needs an energy storage system.