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julie ran eight laps around her school's quarter-mile track in 18 minutes. her average velocity was ___________ m/s.

 Mar 1, 2019
 #1
avatar+98130 
+3

18 minutes = 18 * 60 =  1080 sec

 

Distance =   (1/4) * 8 =  2 miles

 

Convert miles to meters

 

1 mile  = 1609.344 m

 

So

 

2 *1609.344 m /  1080 sec     ≈  2.98 m / s

 

 

cool cool cool

 Mar 1, 2019
edited by CPhill  Mar 1, 2019
 #2
avatar+17331 
+2

8 laps  x   1/4 mi/lap = 2 miles 

 

2 miles = 3219 meters

 

18 minutes = 1080 s

 

3219 m / 1080 s = ~~ 2.98 m/s

 Mar 1, 2019
edited by ElectricPavlov  Mar 1, 2019

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