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Question 6132
NEET Physics · Hard

System of Particles & Rotational Motion: Rotational KE MCQ

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Rotational KEHardQuestion 6132

Question

A solid sphere rolls down an incline without slipping. Fraction of total KE that is rotational:
  1. A
    2/7
    Correct
  2. B
    5/7
  3. C
    2/5
  4. D
    1/2

Correct answer

2/7

Explanation

KE_rot/KE_total = (2/5 Mv²/2)/(7Mv²/10) = (Mv²/5)/(7Mv²/10) = 2/7. = 2/7.

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