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Jul 10, 2008

Problem 6/10

The question asks for the forces under the rollers, but it never says anything about a friction between the rollers and the ground. Normally a question will mention that friction is negligible, but it doesn't here, so are we to assume that there is no friction between wheels A and B?
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3 comments:

Holybee667 said...

I also assumed that since they are wheels (A and B) that the force of friction exerted on them is negligible. I hope that helps.

July 10, 2008 at 11:22 PM
ckearney said...

Since they're modeled as rollers, each wheel produces a a force in the positive y-direction on the crate. You won't be able to apply friction techniques without coefficients or a statement of static equilibrium.

Writing force and moment equations should be sufficient to find your solution. Good luck.

July 11, 2008 at 12:45 AM
Eric L. said...

Be sure to remember to use the perpendicular distance for the moments. It's been a while since I'd done moments and I initially messed up.

July 11, 2008 at 9:04 AM

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