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: Energy question

  1. Mar 1, 2013 #1
    1. The problem statement, all variables and given/known data

    A 3.0 kg object travels vertically at a constant speed of 2.0m/s. What is the increase in gravitational potential energy after 4.0 sec?

    2. Relevant equations


    3. The attempt at a solution

    I know i need to find the height but, with constant velocity i dont know how to plug into any kinematic equations to find the height.

    The answer is 2.4 x 10^2 J.
  2. jcsd
  3. Mar 1, 2013 #2
    A change in gravitational potential energy results from a change in height. You can find that change in height using kinematics equations.
  4. Mar 1, 2013 #3
    Yes, i know that part...but i have no idea how to plug into the kinematic equations with a constant velocity. All the equations are involved with a initial velocity and a final velocity.
  5. Mar 1, 2013 #4
    At constant speed v, what is the distance covered during some time t?
  6. Mar 1, 2013 #5
    omg thanks!! I totally forgot the most basic one, V= d/t!!
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted