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Slingshot Problem

  1. Jun 16, 2013 #1
    1. The problem statement, all variables and given/known data

    You shoot a 0.08 kg box across the ground with 60 N/m slingshot, stretched back 0.15m. The box slides 4.22m before coming to a stop. What is the force of friction acting on the box as it slides across the ground?

    2. Relevant equations

    EPE = 1/2kx^2

    3. The attempt at a solution

    E1 = 1/2(60)(0.15)^2
    E1 = 0.3375J
    W = 0 - 0.3375J = -0.3375J
  2. jcsd
  3. Jun 16, 2013 #2


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    Homework Helper

    Right so all the work done by the slingshot will be opposided by the work done by the frictional force.

    How would you calculate the work done by the friction force F with a distance of 4.22 m ?
  4. Jun 16, 2013 #3
    W = F * D, so F = W / D? I got around -0.08 N for force. Is that the Force of Friction?
  5. Jun 16, 2013 #4


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    Science Advisor
    Homework Helper
    Gold Member

    You seem to have halved twice over.
  6. Jun 16, 2013 #5
  7. Jun 16, 2013 #6


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    Staff: Mentor

    Verify your calculation of E1.
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