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!

Accelerating Wedge Problem, Help

  1. Sep 16, 2008 #1
    Accelerating Wedge Problem, Help!!!

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

    A 45degree wedge is pushed along a table with constant acceleration A.
    A block of mass m slides without friction on the wedge. Find its acceleration.
    As always, find your result in an inertial frame.

    2. Relevant equations

    (x - X) = (h - y)cot (theta)

    3. The attempt at a solution

    I used the equation (x - X) = (h - y)cot (theta)
    x = horizontal distance from the original place to the block
    X = horizontal distance from the original place to the wedge
    h = height of the wedge
    y = vertical distance from the ground to the block

    Since the angle is 45 degree, cot (theta) = 1 and
    after differentiating twice gives, x.. - X.. = -y.. (.. means twice differentiated)

    And X.. = A (the accel. of the wedge), so y.. = A - x..
    And since y.. is not affected by A, isnt y.. just -g?

    the answer clue in the book says "If A = 3g, y.. = g

    Please Help!!
  2. jcsd
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Can you help with the solution or looking for help too?
Draft saved Draft deleted