ch04-p008 - 8. Our coordinate system has i pointed east and...

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avg ˆˆ (483 km)i (966 km)j (215 km/h)i (429 km/h)j. 2.25 h v == G with a magnitude 22 | | (215 km/h) ( 429 km/h) 480 km/h. v =+ = G (d) The direction of v G is 26.6° east of south, same as in part (b). In magnitude-angle notation, we would have (480 km/h 63.4 ). v =∠ ° G (e) Assuming the AB trip was a straight one, and similarly for the BC trip, then || G r AB is the distance traveled during the AB trip, and G r BC is the distance traveled during the BC trip. Since the average speed is the total distance divided by the total time, it equals 483 km 966 km 644 km/h. 2.25 h + = 8. Our coordinate system has # i pointed east and
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