Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Very basic acceleration question (typo?)

  1. Jun 25, 2007 #1
    An object starts at time t = 0 with a velocity of v = +4 m/s and undergoes a constant acceleration of a = -15 m/s2
    At what time does the speed of the object reach zero?

    so,
    vf = vi + a t
    so delta t = 0 - 4 / -15

    = .27 seconds

    apparentrly this is wrong answer, but I cant see why? seems really simple!

    I am suspecting that this question had a typo in it?

    Sorry, please disregard, it was sig dig problem
    should be .267 seconds!
     
  2. jcsd
  3. Jun 25, 2007 #2
    Thanks for posting this in the Homework Help section mujadeo.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook