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: Radial Track, Find Loss of TME

  1. Jun 17, 2005 #1
    looks like a fun problem, just gotta understand it:

    A 500g block slides down a radial track with height of 1.0 m, it's radius is 1.0 m, with velocity of 4 m/s at the end of the track. what is the loss of the TME?

    Disipation of energy problem:
    TMEf - TMEo
    F * D = K.E.f + P.E.f - (K.E.o + P.E. o)
    friction * cos(180) * D = (1/2 mv^2f + mghfo) - (1/2mv^2o + mgho)
    f(-1)(1) = (1/2)(500)(4)^2 + 0 - (500)(9.8)(1)

    Can someone please confirm this?
    is the loss of TME = 900 N = Friction ??
     
  2. jcsd
  3. Jun 17, 2005 #2
    Energy isn't measured in newtons and you haven't converted your mass to kilograms either.
     
  4. Jun 17, 2005 #3
    so, is the new equation:
    f(-1)(1) = (1/2)(0.5)(4)^2 + 0 - (0.5)(9.8)(1) ??
    ans: 900 J ?
     
    Last edited: Jun 17, 2005
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook