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Forces that are equal in size but opposite in direction are called balanced forces. Balanced forces will not change the motion or move an object at rest. On the other hand, forces that are not equal or opposite and do cause a change in the motion of an object are known as unbalanced forces. Continue Reading.
Gravity is an attractive force that pull any pair of masses towards each other. The force is equal to mass_1 time mass_2 divided by the square of the distance between them and all multiplied by the universal gravitational constant, G. We suspect that this force is transmitted at the speed of light, but we have not been able to confirm that yet. As far as we can tell, nothing can block this force.