A 68-kg man stands on a bathroom scale inside an elevator. The scale measures in units of newtons.   (a) The elevator accelerates upward from rest at a rate of 1.25 m/s2 for 1.50 s. What does the scale read during this 1.50 s interval?  N   (b) The elevator continues upward at constant velocity for 8.50 s. What does the scale read now?  N   (c) While still moving upward, the elevator's speed decreases at a rate of 0.450 m/s2 for 3.00 s. What is the scale reading during this time?  N

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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: