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!

Calculate the work done

  1. Sep 16, 2007 #1
    1. The problem statement, all variables and given/known data

    Two tugs pull a tanker. Each at a force 1400000N with one at an angle 14degrees west of north, the other 14degrees east of north. They pull the tanker 0.66km north.

    2. Relevant equations


    3. The attempt at a solution

    I simply took the vector force of 1 tanker

    1400000Cos(14) = 1358414N multiplied it by two for both tugs = 2716828

    Therefore W (asked in 3 sig figs) = 2716828*0.66 = 1.79*10^6Nm

    Unfortunately I'm told this is wrong :frown:

    Appreciate any help!
    Last edited: Sep 16, 2007
  2. jcsd
  3. Sep 16, 2007 #2

    Doc Al

    User Avatar

    Staff: Mentor

    You forgot the distance!
  4. Sep 16, 2007 #3

    Look at your units.
  5. Sep 16, 2007 #4

    Doc Al

    User Avatar

    Staff: Mentor

    OK... you put in the distance (good!), but the distance is measured in km, not meters.
  6. Sep 16, 2007 #5
    Good ol MKS

    Thanks for that :)
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook