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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Oct 15, 2008

3/202

After making a free-body diagram of the forces on the block, I am left question the direction of the frictional force. Would it go against the direction of velocity of the block or against the force of the push on the block?
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3 comments:

BoilerBrian said...

Friction always opposes motion. Therefore, frictional force must be in the direction of velocity. The other force exerted on the block would only contribute (along with friction) to slowing the block down.

October 16, 2008 at 8:28 AM
john_v said...

i think you meant that the friction force is opposite the direction of the velocity because the block is moving to the left and a force P is slowing it down along with friction. Therefore, P and friction force should be in the same direction.

October 16, 2008 at 5:00 PM
Adam Watson said...

john's got it. by your first sentence I'm sure that's what brian meant to say.

October 16, 2008 at 7:27 PM

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