Rotational Kinetic Energy

AP Physics 1· difficulty 3/5

A solid sphere rolls without slipping. The fraction of its KE that is <strong>translational</strong> is

  • A

    2/72/7

  • B

    1/21/2

  • C

    5/75/7

    check_circle
  • D

    2/52/5

Explanation

Trans: 12Mv2\tfrac{1}{2}M v^2, Rot: 15Mv2\tfrac{1}{5}M v^2, Total 710Mv2\tfrac{7}{10}M v^2. Trans fraction: 5/75/7.

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