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Spring Problem

  1. Oct 18, 2011 #1
    1. A 4020 gram block slides on a frictionless surface into a spring and compresses it 3.70 cm before the block briefly comes to rest. The spring constant is 2500 N/m. Calculate the speed of the block just before it compresses the spring.



    2. KE=1/2mv^2 and U_s=1/2kx^2



    3. KE = U_s
    2010v^2=1.71
    v=0.0292 m/s


    My professor received a different speed in her answer so I was wondering if I did something wrong.
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Oct 18, 2011 #2

    PhanthomJay

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    You've got to watch units and algebra. Convert grams to kg and cm to meters before solving, and try again. Your units must be consistent.
     
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