it is used to change directions
a cannon
Planaria and Flatworms
There is such a thing as true worms. Some examples would be earth worms, red wrigglers, blood worms etc.
Some examples of worm-like creatures found in different ecosystems include earthworms in soil, nematodes in water and soil, and leeches in freshwater environments.
worm
Earthworms, leeches, rag worms and just about any segmented worm you can think of.
it is used to change directions
yes you can reverse worm and gear. A worm gear can rotate the worm, its based on the lead angle, pressure angle and co.efficient of friction between the pairs.
hook worm and ascaris
doorknobs, volume knobs, wrenches, a Ferris wheel, a faucet handle, bicycle wheel,clock
doorknobs, volume knobs, wrenches, a Ferris wheel, a faucet handle, bicycle wheel,clock
A bass guitar head.