Physics-
General
Easy

Question

A rod of length L rotate about an axis passing through its Centre and normal to its length with an angular velocity ω. If A is the cross-section and D is the density of material of rod. Find its rotational K.E.

  1. 1 half AL cubed straight D phi squared
  2. 1 over 6 AL cubed straight D omega squared
  3. 1 over 24 AL cubed straight D omega squared
  4. 1 over 12 AL cubed straight D omega squared

The correct answer is: 1 over 24 AL cubed straight D omega squared

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