[TECH]:: Direct demonstration of gravitational attraction - maybe.

[RussellMc]

Utterly awesome !!! (if genuine)

Direct demonstration of gravitational attraction. I had been intending to
attempt a demonstration using two heavy lead balls suspended on long wires
but this is much easier and vastly superior. I hope it's not "cooked" with
respect to magnitude of effect. Should be easy enough to prove one way or
the other. The magnitude of the force involved is incredibly small so I'm
somewhat suspicious. ~= 1978 apparently.

Russell

[David C Brown]

That is just a modern version of the Cavendish experiment done in the
1790's
https://en.wikipedia.org/wiki/Cavendish_experiment#:~:text=The%20Cavendish%20experiment%2C%20performed%20in,values%20for%20the%20gravitational%20constant.
<https://en.wikipedia.org/wiki/Cavendish_experiment#:~:text=The%20Cavendish%20experiment%2C%20performed%20in,values%20for%20the%20gravitational%20constant.>

I remember trying to repeat the experiment in the late sixties my second
year undergraduate physics lab with limited success. Vibrations caused by
people walking about and by road traffic were very intrusive.
__________________________________________
David C Brown
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*Sent from my etch-a-sketch*

Post by RussellMc
Utterly awesome !!! (if genuine)
Direct demonstration of gravitational attraction. I had been intending to
attempt a demonstration using two heavy lead balls suspended on long wires
but this is much easier and vastly superior. I hope it's not "cooked" with
respect to magnitude of effect. Should be easy enough to prove one way or
the other. The magnitude of the force involved is incredibly small so I'm
somewhat suspicious. ~= 1978 apparently.
http://youtu.be/Ym6nlwvQZnE
Russell
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