A race car circles 10 times around a circular 8.0-km track in 20 min.

2 answers:

6 0

Find the average speed and the average velocity.

Average speed = distance / time

distance = 10 x 8000 m = 80,000 m
time = 20 min * 60 s/min = 1200 s

Average speed = 80,000 m / 1200 s = 66.67 m/s

Average velocity = displacement / time

Given that the race car made complete circles the final poin is the same initial point, then its displacement is zero and the average velocity is zero too.

fredd [130]3 years ago

5 0

Assuming that you're asking for the average speed,

Average speed = distance / time

since he circle 8 km track 10 times, the distance is 80,000 m and the time is 20 min or 1200 seconds
Average speed = 80,000 / 1200 = 66.67 m/s

Hope this helps

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