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J. Perelman
"Entertaining physics". Book 1.
Chapter 4. Rotation. "Perpetual motion machines"


With the rapid rotation of the centrifugal effect can reach such a magnitude that exceeds the action of gravity. Here is an interesting experience that shows what a significant repelling force developed during rotation of ordinary wheels. We know that young plant always directs the stem in the direction opposite to the force of gravity, i.e., simply put, is growing up. But get the seeds to germinate on the rim of a rapidly rotating wheel, as did the first English botanist knight over a hundred years ago. You will see amazing thing: the roots of sprouts will be directed outward, and the stems were inside, along the radii of the wheel.

Legumes seeds, sprouted on the rim of a rotating wheel. Stems are directed towards the axis, the roots outward.

We seem to have deceived plant: made to influence it instead of gravity another force, which is directed away from the center of the wheel out. As well as the blade runs always in the direction opposite to gravity, then he drew himself up inside the wheel, in the direction from the rim to the axis. Our artificial gravity was stronger than natural, and the young plants grew under her action.

Entertaining physics J. Perelman


System Orphus


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