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: Simple work problem (ramp)

  1. Oct 14, 2012 #1
    1. The problem statement, all variables and given/known data


    2. Relevant equations


    3. The attempt at a solution

    My questions: 1) At around 2:30, when he draws out the free body diagram, I don't understand how he comes up with these Equations. For example, ƩFx = Fa - FgSinθ.

    Why is it "-"? Is it because the x component of gravity is acting against the Fa?

    2) Same as above, but how does he come up with the sum of the forces on the Y component?
  2. jcsd
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted