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 of Object on Inclined Place

  1. Jan 26, 2004 #1
    I need extra help. I'm studying for my Final Exam which is tomorrow and I cannot remember how to find forces of objects on an inclined plane. The question I'm having troubles with is:
    A 12.5 kg crate is placed on a ramp that is at an angle of 22 degrees from the horizontal. Find the acceleration of the crate would be down the ramp:
    a) in the absence of friction (answer 3.67 m/s-squared down slope)
    b) if the coefficient of kinetic friction is 0.0 (0.95 m/s-squared down slope)
    I have tried this and I know that I need to find the force of Gravity that is parallel to the direction the box is going. But I keep getting like 347 and then an answer of like 20.0 something m/s-squared. What am I doing wrong!?!
  2. jcsd
  3. Jan 26, 2004 #2
    You should be doing this:
    122.5sin22 = 45.9N or 45.9kg m/s^2

    Fnet = ma
    a = Fnet/m
    a = (45.9kg m/s^2)/(12.5kg)
    a = 3.67 m/s^2
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: Force of Object on Inclined Place