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Subject:
physics
Category: Science > Physics Asked by: goog34-ga List Price: $5.00 |
Posted:
13 Dec 2004 20:57 PST
Expires: 16 Dec 2004 22:30 PST Question ID: 442287 |
You are working at a billiard parlor and one of your customers complains that a fellow customer is using a ?trick? ball. Trick billiard balls have the same diameter and weight as a regular billiard ball, but are hollow. Your boss tells you to use an inclined plane to determine if the ball is hollow. a) Calculate (show your calculations) the moment of inertia for both the solid and hollow balls. b) Write the Lagrangian for a ball rolling down the inclined plane. Find the equation(s) of motion. c) How will you tell if the ball is ?trick?? |
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There is no answer at this time. |
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Subject:
Re: physics
From: touf-ga on 14 Dec 2004 17:24 PST |
The moment of inertia for the hollow ball will be greater than the moment of inertia for the solid ball. This is because the center of mass for the hollow ball is closer to the circumfrence than is the case with the solid ball. When you put the balls on an inclined plane, the hollow ball should roll slower. As for the othe two, sound like homework problems - you're on your own for those -- well, for $5, anyways... |
Subject:
Re: physics
From: fractl-ga on 16 Dec 2004 00:39 PST |
Please correct me if I'm wrong here...but wouldnt the center of mass still be in the center (assuming that hollow center of the trick ball is spherical and positioned in the middle) for both the trick and the regular ball. -Fractl |
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