Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Really simple Question Just want to see if I'm applying correctly

  1. Jun 29, 2006 #1
    Say an object of

    mass = 3kg

    moves down an INCLINE of a

    distance = 0.4 m
    In a time = .25 sec

    What is the NET Force acting on the object?

    I think I'm going about this with the right equations and what not...but I want to make sure....

  2. jcsd
  3. Jun 29, 2006 #2


    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    Well first you have to calculate the acceleration then apply to Newton's second law F=ma.
  4. Jun 29, 2006 #3

    Andrew Mason

    User Avatar
    Science Advisor
    Homework Helper

    What is the speed at time t=0? Is it at rest?

  5. Jun 30, 2006 #4
    Assuming it starts at rest and assuming it's uniform acceleration, the acceleration would be obtained from the equation x = x0 + vt + 0.5a*t^2 (apologies, I don't know the board code for making pretty equations just yet, this is my first post). Then, as Kurdt said, you can use F = ma to work out the net force on the object. :smile:
  6. Jun 30, 2006 #5


    User Avatar

    Where's your working then?

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