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A ring ( mass 2g) is roatating about ins axis with an angular velocity of ∏ rad/s . Two body of equal masses ( 5g ) are fixed at the two end points of a diameter. Now what will be the angular velocity of the ring? Thanking you in anticipation.

A ring ( mass 2g) is roatating about ins axis with an angular velocity of ∏ rad/s . Two body of equal masses ( 5g ) are fixed at the two end points of a diameter. Now what will be the angular velocity of the ring?


 Thanking you in anticipation.

Grade:12

1 Answers

Anurag Kishore
37 Points
12 years ago

Hi

In these type of questions use conservation of angular momentum about axis of rotation

For ring I = MR2

use

I1w1 = I2 w2                   where  M = 2g           and       m = 5g

=> MR2 ∏ = (MR2 + 2mR2) w

=> 2∏ = (2+2*5)w

=> w = 2∏/12 = ∏/6 rad/sec

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