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!

Hard/Tricky Problem on Energy Conservation

  1. Dec 13, 2009 #1
    1. The problem statement, all variables and given/known data
    If the car is given an initial speed of 4.0 m/s, what is the largest value that the radius R can have if the car is to remain in contact with the circular tract at all times?
    See the attached file (named: car.pdf) for the drawing.

    2. Relevant equations
    PE=mgh ----> Formula for Potential Energy
    KE=(1/2)mv² ----> Formula for Kinetic Energy
    Fc=mv²/R ----> Formula for Centripetal Force

    3. The attempt at a solution
    My initial attempt was to assume that the car has zero velocity at the top of the circle. However this is not true, since the car should "remain in contact with the circular tract at all times". This is an even problem from my textbook, so no answer is given in the back. By the way, I am referring to "Physics 6th Edition" by Cutnell & Johnson.

    Thank you for helping!
     
  2. jcsd
  3. Dec 13, 2009 #2
    I am sorry if the attachment didn't show up. Here is it.
     

    Attached Files:

    • car.pdf
      car.pdf
      File size:
      80.9 KB
      Views:
      76
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Hard/Tricky Problem on Energy Conservation
  1. Tricky Energy Problem (Replies: 1)

Loading...