A graph is plotted of the vertical velocity component vy of an elevator versus time. The y-axis

Question:

A graph is plotted of the vertical velocity component vy of an elevator versus time. The y-axis points up. 

(a) How high is the elevator above the starting point (t = 0) after 20 s have elapsed? 

(b) When is the elevator at its highest location above the starting point?

(c) Describe the motion in words. 

(d) Sketch a graph of y(t).


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