(a) The elevator accelerates upward from rest at a rate of 1.7 for 1.6 s. s2 (i) Newton's Second Law in the y-direction can be written as T= 1 EF,=-1 meg+ 1 •m¸a (ii) Calculate the tension in the cable supporting the elevator. T= 19567 XN (iii) How high has the elevator moved during this time? Ay= (iv) Calculate the velocity of the elevator after this time. m v(t=1.6 s) = %3D S

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Newton's First Law of Motion

If a very smooth ball is rolled down an inclined surface with zero friction, the ball will continue to roll indefinitely for an infinite time, in an attempt to reach to the same height on the opposite hill!