![equilibrium 3d equilibrium 3d](https://thumbs.dreamstime.com/z/equilibrium-d-people-man-person-ball-32021772.jpg)
(b) Choose the location of the rotation axis in other words, choose the pivot point with respect to which you will compute torques of acting forces. A minus sign ( − ) ( − ) means that the actual direction is opposite to the assumed working direction.
#EQUILIBRIUM 3D PLUS#
A plus sign ( + ) ( + ) means that the working direction is the actual direction.
![equilibrium 3d equilibrium 3d](https://images3.sw-cdn.net/product/picture/710x528_7019702_2981619_1459320522.jpg)
For an unknown force, the direction must be assigned arbitrarily think of it as a ‘working direction’ or ‘suspected direction.’ The correct direction is determined by the sign that you obtain in the final solution. Label all forces-you will need this for correct computations of net forces in the x- and y-directions. As you do this for each force, cross out the original force so that you do not erroneously include the same force twice in equations. When suitable, represent the forces in terms of their components in the chosen reference frame. Draw a free-body diagram for the object, including only the forces that act on it. (a) Choose the xy-reference frame for the problem.
![equilibrium 3d equilibrium 3d](https://www.burnout-beratung-lenz.de/wp-content/uploads/2013/12/Balance-Brett.jpg)
For some systems in equilibrium, it may be necessary to consider more than one object.