Physics (College)

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A car starts from rest at a stop sign. It accelerates at 2.0 m/s^2for 6.0 seconds, coasts for 2.0 s, and then slows down at a rate of 1.5 m/s^2 for the next stop sign.
How far apart are the stop signs?

  • Physics (College) -

    divide it into three parts.

    part one: acceleration.
    find vf from a*t then find distance
    part two: constant velocity
    you know v, d=v*t
    part three:
    you know vi, vf, and a. Find distance
    vf^2=vi^2+2ad

    add the three distances

  • Physics (College) -

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