Question

rotation question

Answer 1

@Mashy

Answer 2

wow.. how can each part move with velocity v..!? ? :-/.. damn!

Answer 3

i know nothing about it. :/

Answer 4

its being rotated that way right? :-/

Answer 5

hmm. yeah. i think so.

Answer 6

but different parts move with different speeds.. how can it be same? :-/

Answer 7

hahah. i dont know. scratch your brain. :P

Answer 8

darn it!..

Answer 9

k its not rotating that way.. its rotating about its centre.. so that the ring gets tension.. !! ..

Answer 10

hmm. :P

Answer 11

you mean on the floor? horizontally?

Answer 12

yea.. precisely.. so the ring is tensed.. cause when you rotate something it tries to expand.. but.. i m not able to get an expression for the centripetal force!

Answer 13

hmm. try try. :P

Answer 14

this was my idea

Answer 15

yea.. but what provides it the centripetal force?...

Answer 16

of the 4 options given, do they look like any useful formulas perhaps?

Answer 17

the normal is the centripital force right?

Answer 18

centripetal force formula :P..
but i m wondering.. in this case.. the ring would just keep on rotating for ever.. (cause no friction) .. so the ring is constantly tensed.. in general when something keeps rotating like this.. what provides it the centripetal force? the intermolecular forces?

Answer 19

im thinking of placing a bicycle wheel on a conveyor belt of constant speed. but im not sure at the moment if thats a good idea or not

Answer 20

what? :O

Answer 21

if that was a joke.. that was horrible :P

Answer 22

what dictates the centripital force acting on the wheel? Joke, no. Just trying to develop a concept in my head is all

Answer 23

i recall something similar to this in physics class last term, about a car going around a curve at a constant speed