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Homework Help: How long does the box take to reach the wall?

  1. Jun 26, 2015 #1
    1. The problem statement, all variables and given/known data
    A stationary 10 g box is pushed with a force 20 newtons across a level floor. How long will it take the box to reach a wall 10 meters away?

    2. Relevant equations
    Applied force - Friction Force?

    3. The attempt at a solution
    I am unsure how to attempt this. Do I need to know the static and moving coefficients of friction?
    Last edited: Jun 26, 2015
  2. jcsd
  3. Jun 26, 2015 #2

    Simon Bridge

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    ... try it and see.

    If you need the friction coefficients - are you given enough information to solve the problem?
  4. Jun 28, 2015 #3

    rude man

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    If you knew the kinetic coeff. of friction you could apportion part of the 20N force to overcoming friction and the rest (if any) to accelerating the box.

    You could altenatively assume zero friction if that coeff. is not given to you.
  5. Jun 28, 2015 #4
    From the problem you can tell what is the initial velocity and the acceleration, right?
  6. Jun 29, 2015 #5


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    Without the coefficient of friction, the acceleration is not knowable.
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