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Work Problems

  1. Dec 2, 2009 #1
    1. The problem statement, all variables and given/known data
    1. An 85 g wooden block is set up against a spring. The block is pushed into the spring, compressing it a distance of 2.0cm and then released. k= 78N/m. What is the speed of the block when it reaches its initial point.

    2. A 5.0kg crate slides down a smooth ramp that is elevated at an angle of 38 degrees. length of ramp= 2m. What will be the speed of the crate at the bottom of the ramp?


    2. Relevant equations
    Us= .5kx^2
    Ug= mgh
    KE=.5mv^2

    3. The attempt at a solution
    1. Us= .0156J? I don't know how to find its speed.

    Any help you can provide is appreciated. Thanks in advance.
     
  2. jcsd
  3. Dec 2, 2009 #2
    The solution to both questions lie in the idea of conservation of energy.
     
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