Physics
General
Easy

Question

A inform rod of length L and  density P is bcing pulled along A smooth floor with a horizontal acceleration alpha what is the magnitude of the stress at the trausverse cross-section through the midpoint of the rod ?

  1. fraction numerator 1 over denominator 3 space end fraction space L P alpha
  2. LPalpha
  3. 2 over 3 L P alpha
  4. fraction numerator L P begin display style alpha end style over denominator 2 end fraction

The correct answer is: fraction numerator L P begin display style alpha end style over denominator 2 end fraction

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