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!

Homework Help: Acceleration vs force

  1. Feb 6, 2008 #1
    The figure shows an acceleration-versus-force graph, attached, for three objects pulled by rubber bands. The mass of object 2 is 0.300 . What are the masses of objects 1 and 3?
    Part A
    ANSWER: = Answer not displayed

    Part B
    ANSWER: = Answer not displayed

    for object 2 the slope is a/F or 1/m or 1/.3kg

    For object 3 the slope is a/F or 2a/5F or 1/5F*3a, what do I do now??
    And for object 1 the slope is a/F or 5a/2F or 3a/2m what do I do now?

    How do I use this information to find the mass of object 3 and 1??????

    Thank you


    Attached Files:

  2. jcsd
  3. Feb 6, 2008 #2
    Well, you know the mass of object 2. The graph tells you that 5N = M *5a soooo 5/(5*.3) = a and you found the multiple of a.

    Can you use that to tell you the true value of a?

    I might have read the value wrong and assumed it crossed the 5. However, it does cross the 1 without a doubt, so replace the 5's with 1's.
    Last edited: Feb 6, 2008
  4. Feb 13, 2009 #3
    i had this same exact problem on a take home test and I still dont understand it.
    Can someone please explain this to me? PLEASE and THANK YOU
  5. Feb 13, 2009 #4


    User Avatar
    Homework Helper

    What does the slope of the graph represent?
  6. Feb 13, 2009 #5
    the slope of the force acceleration graph represents mass
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook