Rotational Equilibrium and Newton's First Law in Rotational Form

AP Physics 1· difficulty 3/5

For a body in static equilibrium, the net torque is zero

  • A

    Only about the center of mass.

  • B

    Only about supported pivots.

  • C

    Only on Earth.

  • D

    About every point in the body.

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Explanation

If Fnet=0F_\text{net} = 0 and the net torque is zero about <strong>any</strong> point, it's zero about every other point. (This is why we can choose convenient pivot points to solve.)

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