ds = f(t) (m/sec) of a body moving along a coordinate line. The accompanying figure shows the velocity v = dt a. When does the body reverse direction? b. When is it moving at a constant speed? c. Graph the body's speed for 0sts 10. d. Graph the acceleration, where defined. Av (m/sec) 5- v = f(t) (sec) 0- 40 -5-

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