1. PF Contest - Win "Conquering the Physics GRE" book! Click Here to Enter
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Kinematcis, archer and his arrow

  1. Aug 16, 2012 #1
    An archer shoots an arrow straight up into the air with an initial velocity of 45 m/s . Calculate the maximum height of the arrow.

    The equation I would use for this is:
    Vf^2 = Vo^2+2as

    Vf is final velocity
    Vo is initial velocity
    a is acceleration (gravity)
    s is displacement

    plug in the numbers we know:
    0^2 = 45^2 + 2(-9.8)s

    now solve for s


    s = 103.32 meters.

    is this right
  2. jcsd
  3. Aug 16, 2012 #2


    User Avatar
    Gold Member

    I would say it is best to rearrange the equation to make [itex] s [/itex] the subject first and then substitute numbers.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook