If three forces acting in one plane upon a rigid body, keep it in equilibrium, then they must either___________________?
(A) meet in a point
(B) be all parallel
(C) at least two of them must meet
(D) all the above are correct
(E) none of the above
If three forces acting in one plane upon a rigid body, keep it in equilibrium, then they must either___________________?
(A) meet in a point
(B) be all parallel
(C) at least two of them must meet
(D) all the above are correct
(E) none of the above
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