•• P13 An elevator is accelerating upward at a rate of 3.2 m/s². A block of mass 30 kg hangs by a low-mass rope from the ceiling, and another block of mass 80 kg hangs by a low-mass rope from the upper block. (a) What are the tensions in the upper and lower ropes? (b) What are the tensions in the upper and lower ropes when the elevator accelerates downward at a rate of 3.2 m/s?

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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: