angular velocity of midpoint

teng125

does anybody knows how to find the angular velocity of the midpoint of a bar??

pls help.........

civil_dude

I think you're going to have to provide additional information...

teng125

no,let say the angular velocity of a bar is given but what is the angular velocity of the midpoint of the bar itself

andrewchang

i would say that the midpoint has the same angular velocity.

durt

A single point can't have angular velocity about itself, can it? (assuming the "midpoint" is also the pivot point)

civil_dude

I do believe that for a rigid body, the angulare velocity is the same for all points on the body.

durt

But the center point is not moving, so it has no angular velocity. I guess it doen't really matter since the point has no mass.

civil_dude

I think that the axis, which runs through the point of rotation, will be rotating, although since r = o, it will have no tangential velocity.

andrewchang

actually, the center point is moving. it just happens to be spinning in the same place.

zthavan

the centre point moves

durt

A point can't "spin." A very, very small object can, but not a point.

andrewchang

http://hyperphysics.phy-astr.gsu.edu...rotq.html#avel

http://kr.cs.ait.ac.th/~radok/physics/b6.htm

http://www.sparknotes.com/physics/ro.../section1.html

fargoth

this is a stupid argument

i thought id enter it, but... nah...

andrewchang

i agree... i think i'll stop now.