perpetual motion gravity

Is there Perpetual motion?
What do you think about perpetual motion? Do you think it exists? Most scientists say it doesn’t but what about earth’s rotation around the sun? I know there is none, or negligible friction, but nothing powers the earth, only gravity. Why can’t we use forces similar to gravity, magnets to power our world?
Thanks
there is when no forces are effecting it
simple =P
GRAVITY WHEEL – PERPETUAL MOTION / First attempt not working yet. . . . . . .
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Tags: energy, perpetual, physics, science, technology

