1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Distance Traveled & Average Speed

  1. Sep 12, 2013 #1
    1. The problem statement, all variables and given/known data

    A driver maintains a steady speed of 30.0 m/s for 55 min and then slows to 10 m/s for the next 5 mins. Determine the the total distance traveled and the average speed for the trip.


    2. Relevant equations

    a = v−v0/t



    3. The attempt at a solution

    a = 30 - 10 / 60 = .333

    Please help me, haven't taken physics in a long time. Review for class.
     
  2. jcsd
  3. Sep 12, 2013 #2

    Pythagorean

    User Avatar
    Gold Member

    distance traveled = (speed of travel)*(time traveled)

    if you change speeds, you can break the problem into two parts, so you'd do the above equation for each part. Can you guess how you'd find the total distance travelled from the two parts?
     
  4. Sep 12, 2013 #3
    find the average: add them up and divide by 2?
     
  5. Sep 12, 2013 #4

    Pythagorean

    User Avatar
    Gold Member

    no, not quite. Start with the total distance first.
     
  6. Sep 12, 2013 #5
    40 m/s? Sorry. I'm really confused.
     
  7. Sep 12, 2013 #6

    Pythagorean

    User Avatar
    Gold Member

    What do you get for the distance traveled in each part?
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted