Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: PLEASE HELP MEEE! I can't figure this out

  1. Nov 11, 2008 #1
    1.) How is the instantaneous speed obtained from a speed-time graph?

    2.) I ADDED A PICTURE OF A TIME GRAPH USED FOR THESE QUESTIONS:

    http://i36.tinypic.com/wkh8gx.jpg

    (the left numbers are distance, the bottom numbers are time (min)

    A. which graph illustrates a constant speed for the whole trip?
    B. which graph show a constantly changing speed?
    C. which graph(s) has (have) an instantaneous speed of zero as some point?
    D. what is the instantaneous speed at 1.0 min for each graph?
    E. calculate the average speed for 0 to 5.0 min for each cyclist.
    17 hours ago - 3 days left to answer.


    THANK YOU SO MUCH IN ADVANCE
     
  2. jcsd
  3. Nov 11, 2008 #2
    How is the instantaneous speed obtained from a speed-time graph?
     
  4. Nov 11, 2008 #3

    LowlyPion

    User Avatar
    Homework Helper

    You have distance on one axis and time on the other.

    What is speed? Is it distance divided by time by any chance?

    At any point what is the rate of change? Isn't it the tangent at that point?
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook