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26 April 2019 13:36

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Asked by: Scott
Subject: Coriolis Force and Coriolis Acceleration
Question: As I recall Coriolis effects are necessary contributors to any rotating body. So, why is there no mention of Coriolis Force or Acceleration in any of the physics treatment of the gyroscope?

2w X r' = Coriolis acceleration
2mw X r' = Coriolis force
Date: 11 October 2006
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Answers (Ordered by Date)

Answer: Glenn Hawkins - 04/12/2006 22:23:52
 Scott, consider a large rotating platform. Place a bowling ball at the axes. As centrifuge pulls the ball outward, friction between the outward sliding ball and the rotating platform causes the ball to roll in the opposite direction of the platform’s rotation. The inertia of the ball resist rotation, yet the further the ball would slide outward from the axes the faster the speed of the platform and therefore the continuously increasing inertial resistance. The ball then does not travel in a straight line from axes to rim, but curves outward and from the direction of rotation. This is the Coriolis effect, the curve, and is what drives the weather system.

Now, what part of the rotating disk of the gyro is free to move outward toward the rim? No part of course, and this is why the Coriolis effect doesn’t exist in solid rotating disks and therefore neither does it exists in the gyro.

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