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Homework Help: Confusion on displacement question

  1. Sep 29, 2012 #1
    1. The problem statement, all variables and given/known data
    A car moves east at 18 m/s for 5 minutes. What its displacement? It says that the answer
    to this question from my teacher is: 5400 m.

    2. Relevant equations
    → →
    X= v *t

    3. The attempt at a solution

    V= 18 m/s [E]
    t= 5 min.

    → → →
    X= v *t = x= (18) (5)

    X= 90 m/s [E]

    am i wrong? or is my teacher's answer wrong? Because my teacher's answer does not include a direction and it seems impossible for that amount to be attained.
  2. jcsd
  3. Sep 29, 2012 #2


    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    5 minutes is 300 seconds. Watch units! Displacement has units of length.
  4. Sep 29, 2012 #3
    oh man, how little was my mistake *facepalm* :frown:.

    yeh it turned 5400 m, but i'm putting to the east to make the answer complete.

    thanks for your help! :D
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