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: Moving Van

  1. Sep 28, 2004 #1
    Ok, here's a problem that stumps me. I'm not quite sure how to go about doing it...especially since there's an angle involved. I tried doing it before, but I forget what I tried...either way, the answer was wrong. Any advice would be appreciated. Thanks! :eek:)

    ----A mass M = 13.0 kg is suspended by a massless string from the ceiling of a van which is moving with constant acceleration a. If the string makes an angle theta = 11o with respect to the vertical, what is the acceleration a of the van?-------
  2. jcsd
  3. Sep 28, 2004 #2


    User Avatar
    Homework Helper

    Use Newton's 2nd Law

    [tex] \sum^{n}_{i=1} \vec{F}_{i} = m \vec{a} [/tex]

    Do a Free Body Diagram, so you can get the acceleration of the Body hanging, which will be ????
  4. Sep 28, 2004 #3
    hmm...but how do i incorporate the angle?
  5. Sep 28, 2004 #4


    User Avatar
    Homework Helper

    Components of Tension.
  6. Sep 29, 2004 #5
    By "Components of Tension", he means that the x & y components can be solved using trigonomotry.

    To find the X component, it would be: Tension * Cos11
    Y component: Tension * Sin11

    Remember that there is also always a Y component of mg doing straight down.

Share this great discussion with others via Reddit, Google+, Twitter, or Facebook