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: Find the magnitude of the horizantal force

  1. Sep 21, 2004 #1
    Hey can someone please help me with this problem. accorning to the back of the book the answer is 28N. I tried doing this first multipling 1.41*7.5 = 10.575. Then i used this formula 10.575cos(13)= but i got 9.59625.
    Am I missing a step, please help?

    a shopper pushes a 7.5-kg shopping cart up a 13 incline. Find the magnitude of the horizantal force, F, needed to give the cart an acceleration of 1.41 m/s2.
  2. jcsd
  3. Sep 21, 2004 #2
    someone please help?
  4. Sep 21, 2004 #3


    User Avatar
    Science Advisor
    Homework Helper

    You need to account for the fact that gravity is tending to accelerate the shopping cart downhill. :-)
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook