Average Speed Between Points A & B: 0 m/s

AI Thread Summary
To calculate the average speed for a round trip from point A to B and back, one must first determine the time taken for each leg of the journey. The person walks from A to B at 5.01 m/s and returns at 3.10 m/s. Average speed is defined as total distance divided by total time, not simply the average of the two speeds. By expressing the time in terms of distance, the total time can be calculated and subsequently used to find the average speed. The discussion emphasizes the importance of understanding the relationship between speed, distance, and time.
frizzler43
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A person walks first at a constant speed of 5.01 m/x along a straight line from point A to B and then back along the line from B to A at a constant speed of 3.10 m/s

What is the average speed over the entire trip?

I've tried everything from adding the two and dividing by two. I've found that the avg. velocity over the trip is 0 m/s.
I know that avg speed=distance over time. I just don't know how you are suppose to find the time o if that's even what you're suppose to do
 
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welcome to pf!

hi frizzler43! welcome to pf! :wink:
frizzler43 said:
… I know that avg speed=distance over time. I just don't know how you are suppose to find the time o if that's even what you're suppose to do

first, calculate the time for each half …

show us what you get :smile:​
 
frizzler43 said:
I just don't know how you are suppose to find the time o if that's even what you're suppose to do
Find the time to go from A to B, then the time to go from B to A. Add to get the total. Hint: Express the time in terms of the distance, which you can just call D.
 
how are you suppose to find the time?
 
frizzler43 said:
how are you suppose to find the time?

uhh? :confused:

speed = distance/time …

get on with it! :rolleyes:​
 

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