Welcome to the website of ME 274 for the Fall 2008 semester. On this site you can view blog posts, add your own blog posts and add comments to existing posts. In addition to the blog are links to course material: course information, information on solution videos, exams, quizzes, homeworks and other course-related material. Direct links to the homework solution videos are also available on the left side of this page.


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Jul 6, 2008

Problem 3/187

When looking at the system for this question, do you use just the bullet at the system, or treat both the bullet and the block as the system to find the change in energy? Basically are we looking for the change in energy of the bullet, or of both the bullet and the block?
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2 comments:

David Hoff said...

I found the change in energy for the block plus the bullet and it matched the answers given in the book.

July 6, 2008 at 5:40 PM
mrb said...

The system is the bullet and the block. Remember the initial velocity of the block is zero so the initial energy is only the kinetic energy of the bullet. The final energy is the kinetic energy of the block and bullet (same velocity).

July 6, 2008 at 9:21 PM

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