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: Help with a Potential Energy Problem

  1. Feb 27, 2008 #1
    In the figure below, a small block of mass m = 1.0 kg can slide along the frictionless loop-the-loop. The block is released from rest at point P, at height h = 8R above the bottom of the loop. (For all parts, answer using g for the acceleration due to gravity, and R and m as appropriate.)
    "[URL [Broken]
    http://www.webassign.net/hrw/08_33.gif

    (a) How much work does the weight of the block do on the block as the block travels from point P to point Q?

    (b) How much work does the weight of the block do on the block as the block travels from point P to the top of the loop?

    (c) What is the potential energy when the block is at point P? (Assume that the gravitational potential energy of the block Earth system is taken to be zero at the bottom of the loop.)

    (d) What is the potential energy when the block is at point Q?

    (e) What is the potential energy when the block is at the top of the loop?
     
    Last edited by a moderator: May 3, 2017
  2. jcsd
  3. Feb 28, 2008 #2
    Last edited by a moderator: Apr 23, 2017
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook