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Author Topic: Rotate pulleys using gravity.  (Read 5335 times)

Offline jigar

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Rotate pulleys using gravity.
« on: November 21, 2006, 07:04:34 AM »
Cross section of pulley1, pulley2 , pulley3 and pulley4 are as shown in figure. Centres of  Pulley 1 and pulley 2 are placed on same horizontal line. Centres of pulley 1 and pulley 2 are fixed. Pulley 1 and pulley 2 can rotate about their centre. Centres of pulley3 and pulley4 are also placed on one horizontal line. Pulley 3 and pulley 4 can also rotate about their centre. Centre of pulley 3 and pulley4 are joined with one stationary plate.Pulley 3 and pulley4 are simply supported on pulley1 and pulley2.Now we apply some load or weight on stationary plate. Finaly this force is applied on pulley 1 and pulley 2 in vertical downward direction because pulley 3 and pulley4 are simply supported on pulley 1 and pulley2. Tengential componants of these force helps to rotate pulley1 , pulley2 , pulley3 and pulley4.

Offline FreeEnergy

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Re: Rotate pulleys using gravity.
« Reply #1 on: November 21, 2006, 07:13:23 AM »
um i really dont know about this one. seems like it will not work sorry. i could be wrong. you just got to build it and test it to see.

Offline xpenzif

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Re: Rotate pulleys using gravity.
« Reply #2 on: January 20, 2007, 05:58:28 AM »
The normal force vectors from pulleys 1&2 will point to the centers of pulleys 3&4. And a circular wheel doesn't spin when you apply a force perpendicular to the surface.