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Homework Help: Pushing a Cart

  1. Sep 20, 2010 #1
    1. The problem statement, all variables and given/known data

    Leaving all other quantities unchanged, what happens in the scenarios below?
    • If you use a cart with half the mass, you cover distance during pushing.
    • If you push twice as long, you reach final speed.
    • If you push twice as long, you cover distance during pushing.
    • If you double the force, you reach final speed.

    2. Relevant equations

    i think f=ma

    3. The attempt at a solution

    I thought the answers were double, double, half, double, but these are wrong. Any help is greatly appreciated!!
     
  2. jcsd
  3. Sep 20, 2010 #2
    This is sort of confusing...

    I would use s=0.5at^2

    and v=a*t

    based on this

    1) double, because a=2F/m

    2) twice as long distance or time?

    if time double

    3) 4x, because t is in the power of 2

    4) you should be able to figure this one out now.
     
  4. Sep 20, 2010 #3
    Thanks for your help!
     
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