question archive A polar bear starts at the North Pole
A polar bear starts at the North Pole
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A polar bear starts at the North Pole. It travels 1.0 km south, then 1.0 km east, then 1.0 km north, then 1.0 km west to return to its starting point. This trip takes 45 min. What was the bear's average velocity?
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Answer:
Total distance travelled = 1 + 1 + 1
= 3 km
Total time taken = 45 min
= 45/60 hours
= 3/4 hours
Average speed = distance/time
= 3 ÷ 3/4
= 3 x 4/3
= 4 km/hr
