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!

Forces and vectors

  1. Sep 18, 2007 #1
    A block is projected up a frictionless inclined plane with initial speed v0 = 3.53 m/s. The angle of incline is = 32.0°.

    I need to find (a) How far up the plane does it go? (b) How long does it take to get there? and (c) What is its speed when it gets back to the bottom?

    I've used F=ma and plugged it into Vf= Vi-at if I rearrange and plug in stuff with F=ma I mgsin(x)=ma the m's cancel out and I'm left with a=mgsin(x) Plugging that into Vf=Vi-at I get Vf=Vi-gsin(x)t If I use that to get b I can say that Vf=0 so 0=3.53sin(32)+9.8sin(32)t

    The sin(32)'s cancel out and I get -3.53/9.8=t how is t negative?

    Attached Files:

  2. jcsd
  3. Sep 18, 2007 #2
    ignore the attachment it was from another problem that I solved before I sent it off
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Discussions: Forces and vectors
  1. Force vectors (Replies: 2)

  2. Fictitious force vectors (Replies: 12)