Question

a body of mass 2kg rotating on circular path of radius 1m . find the angular velocity​

Answer 1

Answer:

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i think your question is=

If 2 kg mass is rotating on a circular path of radius 0.8 m with angular velocity of 44 rad/sec. If radius of the path becomes 1 m, then what will be the value of angular velocity?

mass (m)=2kg; initial radius of the path

(r 1) =0.8 m; initial angular velocity

(w1)= 44rad/sec and final radius of the path

(r2) =1 m,

moment of inertia I 1 = mr 2 ^2= 2*(1)^2= 2kg m^2

therefore from the law of conservation of angular momentum,

momentum, I1w1 = I2w2

or w2 =I*w1/I2 = 1.28*44/2* w2

=28.16 rad/sec

Explanation: