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!

I Work done on brakes vs kinetic energy lost by vehicle

  1. Feb 9, 2017 #1
    When doing work on the brakes of a car or bicycle, how much of that energy is actually removed from the total kinetic energy of the vehicle?
    What is the most efficient braking system?
  2. jcsd
  3. Feb 9, 2017 #2


    User Avatar

    Staff: Mentor

    Welcome to the PF. :smile:
    Yes, the kinetic energy is being converted into heat in the brake components.
    Regenerative braking.
  4. Feb 9, 2017 #3


    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    All of the energy dissipated in the brakes comes from the kinetic energy of the car. ( Unless you are going down hill at constant velocity for example).

    You need to define what you mean by "efficiency" in this context. Beckman has given you a good answer based on one definition.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted