on23 - Solution for On-Line Homework 23 Gravitation II...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Solution to On-Line Homework Problem 23.1() Problem: What can be said about the work done by a conservative force along a closed path? Select One of the Following: (a) It is the force times the total distance travelled, 2 πR if the path is circular. (b-Answer) It is the force times the total distance travelled in the direction of the force, but since the path is closed, the total work is zero. (c) There is no way to tell from this information, since the path probably isn’t circular, so the path is not always perpendicular to the force. Solution The total work is zero. Remember that work is always done by a force outside the system. If we instead include the object exerting the force in the system and talk about potential energy, then the potential energy an object has at point A will always be the same, no matter what route the object takes to get there. These are basically two di±erent ways to say the same thing; the di±erence is which way the system is de²ned. 1
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 3

on23 - Solution for On-Line Homework 23 Gravitation II...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online