Calculating average speeds when distance is unknown

  • Thread starter BogMonkey
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  • #1
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I found a brilliant website with physics questions + solutions here
http://www.solvephysics.com/problems_kinematics.shtml [Broken]
the question I'm on they only tell you the speed travelled in fractions of the total distance but don't tell you the total distance. I looked at the solution but couldn't make much sense of where they got this from
kinematics_problem86_clip_image008.gif

heres the solution page
http://www.solvephysics.com/kinematics_problem86.shtml
 
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Answers and Replies

  • #2
diazona
Homework Helper
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You know [itex]v = d/t[/itex], right? That can be rearranged to [itex]t = d/v[/itex]. Then just plug in values for that quarter of the journey.
 

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