1. Not finding help here? Sign up for a free 30min 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!

Force question

  1. Feb 1, 2008 #1
    We did a lab where we had to measure the mass of a weight that was hanging from an air track which pulled the glider through two timegates positioned above the air track.

    I have to find the force of the hanging weight. F=mg my first mass was .27004kg and the gravity is obviouly 9.8m/s/s.

    So do I use F=.27004kg * (9.8m/s/s)
    F= .27004kg * (-9.8m/s/s)

    Do I put the negative sign with the gravity as the force is downward with the hanging weight????

    Thank you
  2. jcsd
  3. Feb 1, 2008 #2


    User Avatar
    Homework Helper

    The - sign only indicates a direction. So you can leave it as +ve once you remember that putting g as +ve says that the downward direction is taken as +ve.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: Force question
  1. Tension Force Question (Replies: 8)

  2. Forces question (Replies: 1)

  3. Forces question (Replies: 1)

  4. Force Question (Replies: 3)