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Find out the speed of an object

  1. Jan 26, 2016 #1
    1. The problem statement, all variables and given/known data
    A 10.0 kg box is acted on by a constant force of 50.0 N. If it passes a first timer with a speed of 2.0 m/s and then travels 150 cm to a second timer, what would its speed be as it passes the second timer?

    2. Relevant equations
    I know usually to find out the speed of an object it is usually distance over time.
    I know the distance being 150 cm
    However as there is no time i've come to a complete stand still

    3. The attempt at a solution
    Stuck at the beginning, if someone would be kind enough to point me in the right direction please.
     
  2. jcsd
  3. Jan 26, 2016 #2

    haruspex

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    What equations do you know related to motion under constant acceleration?
     
  4. Jan 26, 2016 #3
    Vf = Vi + at
    If that helps at all.
    I have the distance, just not the acceleration to use that equation
     
  5. Jan 26, 2016 #4

    haruspex

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    You should be familiar with the SUVAT equations if you are expected to solve a problem like this.
    See e.g. https://en.m.wikipedia.org/wiki/Equations_of_motion#Uniform_acceleration.
    As for the acceleration, you are given enough information to find it. Which of Newton's laws relates force to acceleration.
     
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