1.

The rotational kinetic energy of two bodies ofmoments of ineritia 9 kg-m? and 1kg-m2 are same.he ratio of their angular momentum is :(1) 3 1(3) 91

Answer»

rotational K.E = 1/2*(I)(w²)

and anglular momentum is = Iw

so, here K.E is same

=> 9(w1²) = 1(w2²)=> w1/w2 = √1/9 = 1/3..

so, Angular momentum ratio will be = (I1)(w1)/(I2)(w2) = 9*w1/(1)*(3w1) = 3/1

so, the value is 3:1

option 1.



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