Calculating Average Velocity for a Bike Ride

AI Thread Summary
To calculate the average velocity for a bike ride, the total distance traveled and total time taken must be determined. After riding for 1.5 hours at 10 km/h, the distance covered is 15 km, and after 30 minutes at 15 km/h, the distance is 7.5 km, resulting in a total distance of 22.5 km. The total time for the ride is 2 hours. The average velocity is then calculated by dividing the total distance by the total time, yielding an average velocity of 11.25 km/h. The discussion emphasizes the importance of using consistent units and correctly applying the average velocity formula.
mkylman
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Homework Statement



You ride your bike for 1.5h @ avg velocity of 10km/h, then for 30min @ 15km/h
What is you average velocity?

So I think that the variables are this

Vf=15km/h(.000004m/s)
Vi=10km/h(.000003m/s)
Tf=90m(5400s)
Tf=30m(1800s)

Homework Equations



That's what I'm asking -_-

I think that it is
Code:
V[sub]avg[/sub] = d[sub]f[/sub] - d[sub]i[/sub]
       ------
       t[sub]f[/sub] - t[sub]i[/sub]

The Attempt at a Solution



everything I try I get gross decimal numbers -_- Isn't there an easier way?
 
Last edited:
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0.000004m/sec is nothing like 15km/hr. I hope you are not using that. Just work in km and hr. You got the right equation though. How far did you travel in all and how long did it take you in all? The quotient is the average velocity.
 
so to get the total distance I'd have to do

d = t/v

1.5h/10kmh = 15km
.5h/15kmh = 7.5km
overall d = 22.5km
overall t = 2h

so my average velocity is
Code:
v = d/t
v = 22.5km/h
    --------
       2h
v = 11.25km/h

^ that?
 
Last edited:
^ That! But I've never seen anyone write / for multiplication before. Don't you mean like 1.5hr*10km/hr=15km?
 
yeah my bad -_- I hadn't realized it til afterwards; I have no idea what I was typing ^_^

Thank you so much man!
 
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