A disc rolls on a table.The ratio of its ke of rotation
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Total kinetic energy =1/2 m*v^2. Rotational k.e= (1/2) I w^2 where I= 2/5 mr^2 so rotational k.e=1/5 mr^2w^2=1/5mv^2 as it rolling on rough horizontal surface without slipping. So total k.e/total rot. Ke=(5/2)..so rotational ke =40% of ke
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