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!

Homework help? [ block on inclined plane ]

  1. Dec 5, 2009 #1
    Homework help?? [ block on inclined plane ]

    1. The problem statement, all variables and given/known data

    002 (part 1 of 3) 10.0 points
    A 3.86 kg block slides down a smooth, fric-
    tionless plane having an inclination of 28◦ .
    The acceleration of gravity is 9.8 m/s2 .
    Find the acceleration of the block.
    Answer in units of m/s2.

    003 (part 2 of 3) 10.0 points
    What is the block’s speed when, starting from
    rest, it has traveled a distance of 2.35 m along
    the incline.
    Answer in units of m/s.

    004 (part 3 of 3) 10.0 points

    What is the magnitude of the perpendicular
    force that the block exerts on the surface of
    the plane at a distance of 2.35 m down the
    incline?
    Answer in units of N.
     
  2. jcsd
  3. Dec 5, 2009 #2
    Re: Homework help?? [ block on inclined plane ]

    We are here to help myaxx... but can't do it for you. You need to throw up some equations and say why you are stuck.
     
  4. Dec 5, 2009 #3
    Re: Homework help?? [ block on inclined plane ]

    i dont know what equations to use.
    i just need the equations for each problem. i can get the answer myself :]
     
  5. Dec 5, 2009 #4
    Re: Homework help?? [ block on inclined plane ]

    OK, but if this is for a class, you should either have a chapter or notes or something to use as a reference.

    The first problem is best understood by use of a free body diagram, illustrating all the forces acting on the block. In this case only a portion of the force of gravity is available to pull the block down the slope. It is related to the trig of the situation.

    The second is a problem in kinematics. You should somewhere have reference to equations which relate distance to either velocity and/or acceleration.

    The third part deals with the force the block exerts on the plane and again can be found by consideration of the free body diagram. Does any of this ring a bell?
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Homework help? [ block on inclined plane ]
Loading...