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Blazing goIITian

Joined:	1 Nov 2008
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11 Apr 2009 09:51:17 IST

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In v=rw (omega ) , for a wheel , where is r measured from ?? the centre of the wheel or the the bot

Kinematics , NewtonsLawsCirMotion , Work Power Energy collisions , Rotation , Gravitation , Simple Harmonic Motion , Fluid Mechanics , Materials Wave Sound , Super Position , units dimensions , com momentum , shm , wave sound

In v=rw (omega ) , for a wheel , where is r measured from ?? the centre of the wheel or the the bottom point ( the contact surface)

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pranav agrawal

Blazing goIITian

Joined: 24 Sep 2008

Posts: 1694

11 Apr 2009 09:53:27 IST

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the axis about which the wheel is rotating ~

Siddhartha Gupta

Blazing goIITian

Joined: 1 Nov 2008

Posts: 329

11 Apr 2009 13:40:57 IST

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Dude, no , if u have a circle rotating , with centre O ...& radius 5 cm .... and u hv a pt P near the top 4 cm from the centre ... and a pt Q above O at 1 cm ...& a pt R near the bottom at 4 cm ..... then by what u are sayin , P & R have the same velocity .... but won't P have a bigger velocity , becoz , it is near the top and so the velocities of the translation and the rotation motion add up , whereas for R , the rotational motion velocity gets subtracted from translational motion's velocity . . . . . . . . .?? . . . . . . . . . If u can understand what I'm trying to say . . . .

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