The correct option is A: the force exerted on the wall by the sledgehammer is - 1000 N
Newton's third law of motion states that for every action or force, there is an equal but oppositely directed force.
Force with which the sledgehammer hits the wall = 1000 N
Thus, the force exerted by the sledgehammer on the wall = -1000 N
Thus, the correct option is A: the force exerted on the wall by the sledgehammer is - 1000 N
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