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!

Changing the Direction of Work

  1. Nov 14, 2014 #1
    If I lift a mass up a certain distance and it creates a positive work quantity, then when I lower the object back down does the work become negative?

    Thank-you
     
  2. jcsd
  3. Nov 14, 2014 #2

    jbriggs444

    User Avatar
    Science Advisor

    Yes, the work done by your hand on the block as you support it while lowering it is a negative quantity.

    (The vector dot product of a force in one direction and a displacement in the opposite direction is negative)
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Changing the Direction of Work
  1. Direction of work (Replies: 48)

Loading...