"Old Nick"
wrote in message

remove ns from my header address to reply via email
A
weight swung
in a circle by a string is experiencing centripetal
force.
Phil

And what holds the string straight?


Nick, you need to _read_ what it says on this site. Click on
the
cf balloon and study it. Interesting stuff.........

http://hyperphysics.phy-astr.gsu.edu...rc.html#rotcon
Phil