Posted by **Giulianna ** on Wednesday, September 3, 2014 at 8:13pm.

A horse canters away from its trainer in a straight line, moving 100 m away in 19.0 s. It then turns abruptly and gallops halfway back in 5.4 s.

(a) Calculate its average speed.

b) Calculate its average velocity for the entire trip, using "away from the trainer" as the positive direction.

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