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Mechanical Engineering QUESTION #2522
Question 1
For a rigid body in general planar motion, the angular momentum principle about the center of mass G gives:
  • \(\sum M_G = I_G\,\alpha\)✔️
  • \(\sum M_G = I_G\,\omega^2\)
  • \(\sum M_G = m\,a_G\)
  • \(\sum M_G = I_G\,\omega + m v_G r\)
Correct Answer Explanation
For a rigid body, the rotational equation about the center of mass G is \(\sum M_G = I_G\,\alpha\), where \(I_G\) is the mass moment of inertia about G and \(\alpha=\dot{\omega}\) is the angular acceleration.