When all the individual forces acting upon an object are balanced, then the object is at equilibrium. When a force is at an angle to the traditional x-y axes, it is customary to consider the components of the force in the analysis. The components of a force vector are the projections of that vector onto the x- and the y-axis. By thinking in terms of components, it is considerably easier to determine what forces would be required to bring an object to equilibrium.
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Balance It! - help
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Version 1:
Consider the three angled forces below. Add one E-W force and one N-S force so that the object is at equilibrium.
Try this link to The Physics Classroom Tutorial for more help: