1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    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!

Homework Help: Work problem

  1. Jun 15, 2010 #1
    1. The problem statement, all variables and given/known data
    a 4kg projectile is fired on earth with intiial velocity 40m/s at an angle of 30 degrees to the horizontal. what work was done in firing the projectile?

    2. Relevant equations

    3. The attempt at a solution
    I got 5542 J. Answer is suppsoedly 3200J
  2. jcsd
  3. Jun 15, 2010 #2


    User Avatar
    Homework Helper

    The work done is the change in kinetic energy. The mass goes from 0 to 40 m/s. So the change in kinetic energy is?
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook