Aspring balance attempts to drag an object across a table, but the object does not move because of the force of friction acting on the body in an equal and opposite direction. when the forces acting upon an object are equal and opposite the object is said to be in a state of equilibrium. what are these forces called?
a) even forces
b) balanced forces
c) harmonized forces
d) unbalanced forces

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jupiter is the largest planet in our solar system, having a mass and radius that are respectively, 318 and 11.2 times that of earth. suppose that an object falls from rest near the surface of each planet and that the acceleration due to gravity remains constant during the fall. each object falls the same distance before striking the ground. determine the ratio of the time of fall on jupiter to that on earth.