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Can an object be in mechanical equilibrium when only a single force acts on it? explain. 1. no; even one force is too much. there should be no forces acting on an object. 2. no; at least one other force is needed to cancel the action of the first force. 3. yes; a single force is necessary to keep the object in mechanical equilibrium. 4. yes; the object will act back with an equal and opposite force.
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