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!

Physics Help please?

  1. Jun 12, 2010 #1
    With brakes fully applied, a 1240 kg car deccelerates from a speed of 86.0 km/hr. What is the work done by the braking force in bringing the car to a stop?

    What is the change in the kinetic energy of the car?


    I keep trying and it saying my answers are wrong can anyone help?
     
  2. jcsd
  3. Jun 12, 2010 #2

    vela

    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper
    Education Advisor

    You need to show your work so we can see what mistake you're making.
     
  4. Jun 12, 2010 #3
    It's possible to solve the question using the Work-Energy theorem. You've pretty much solved it in your post without noticing.

    You aren't asked for the force or the distance, just the work done in bringing the car to a halt, and that's straightforward.
     
    Last edited by a moderator: Jun 12, 2010
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Physics Help please?
  1. Help please physics (Replies: 5)

Loading...