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Homework Help: Speed = distance/time

  1. Mar 24, 2012 #1
    1. The problem statement, all variables and given/known data

    Plot on a graph the speed-time graph for the Mars lander (Fig 2.2) and find its regression line
    This should be y=3.7x+20
    This tells you the initial speed was 20 m/s
    and the acceleration due to gravity on Mars is 3.7 m/s2

    2. Relevant equations

    y=mx + b

    3. The attempt at a solution

    I just need confirmation on my data table:
    Time Speed
    0 20
    1 23.7
    2 27.4
    3 31.1
    4 34.8
    5 38.5
    6 42.2
    7 45.9
  2. jcsd
  3. Mar 24, 2012 #2


    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper

    Re: speed=distance/time


    It's pretty straightforward to check the equation with your data. If you let x equal 1, 2, 3, etc., what do you get for y? Does the value of y you get from the equation agree with the value of y in the table?
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