Udayan wrote:

Hi !!

I am participating in a conrtaption contest in our college..
your good ideas are welcome...

OBJECTIVE : hoist a flag 8cm X 8cm upto a height of 50 cm.
using different energy conversions.
Requirements : There should be maxium number of energy conversions.
The number of distinct steps should be minium 10.
Ideally about 25 to 30 distinct steps.

Someone having intrest plz guide me and tell me different distinct
steps can be used.
If u know any site regarding the same plz let me know.
Reply me soon

Best regards !
Udayan

I'm not going to design your project for you, but I will tell you how
to find cheap equipment that might be useful:
- Bowling alleys will donate "house" bowling balls with scarred
surfaces
- Water is cheap and weighs quite a bit and can be moved (with a rain
gutter) from place to place easily
- Old mattresses are a good source for springs of usable strength
- A 2x4 of rotten quality (low cost) still makes an excellent lever
- Epoxy a bike tire to a rim after removing the inner tube. Fill the
tire with buckshot and seal the hole where the valve stem would be with
epoxy. Flywheel.
- Electric shoe polishers make excellent flywheel revvers.
- Dropping dry ice in water in a closed container provides a source of
gas pressure. Careful! Explosive release is possible!
- Burning newspaper in a barrel is a good way to generate hot air.
- Any old electric motor that is cranked by hand will generate
electricity.
- A 9V battery applied to steel wool will light it on fire.

PD