9. If a spherical ball rolls on a table
without slipping the fraction of its
total energy associated with
ratational energy is
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Answer:
Explanation:
ETotal = 1/2IW2+1/2MV2
=1/2×2/5MR2W2+1/2MV2
=1/5 MR 2 W2+1/2 MV 2 =1/5MV2+1/2MV2
=7/10 M V2
KErot=1/2IW2=1/5 MV 2
KETotalKErot=1/5MV 2/7/10 MV 2
=2/7.
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