A metal box having a mass of 100.0kg is pulled along a level plane, at uniform speed, by a horizontal rope applying a force of 325 N. An additional mass of 40.0 kg is now added to the box. What must be the force in the rope to move the box at uniform speed? If the rope will not transmit a force of more than 500.0 N, what is the greatest mass which can be added to the box?

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Newton's Second Law

Newton’s laws of motion describe the relationship between the motion of an object and forces acting on it. Newton’s law of motion has two types as follows: