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beks73 [17]
3 years ago
10

A dog walks 10 km north in 2 hours and then 8 km south in 1 hour.

Computers and Technology
1 answer:
OverLord2011 [107]3 years ago
3 0

Answer:

Average speed = 6 km/h and Average velocity = 0.67 km/h

Explanation:

Given that,

A dog walks 10 km north in 2 hours and then 8 km south in 1 hour.

(a) Average speed = total distance traveled divided by total time taken

Distance = 10+8 = 18 km

Total time = 2+1 = 3 h

Average speed = (18/3 )km/h= 6 km/h

(b) Average velocity = net displacement divided by total time taken

Let north is positive and south is negative

Displacement = 10+(-8) = 2 km

Total time = 2+1 = 3 h

Average velocity= (2/3 )km/h= 0.67 km/h

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