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mrh1192
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Homework Statement
Put a hot metal ball on parallel horizontal rails. The ball starts to move. Investigate the phenomenon.
Homework Equations
I have found two equations, one exponential and one linear relating the expansion of the rails and the ball to the temperature increase.
The Attempt at a Solution
I have been working at this problem for more than 3 weeks now. I have tried heating up the rails and ball separately to try and measure their expansion, and have tried the experimental set up numerous times however the ball simply won't move. I have tried heating the ball when it is on the rails, to try and induce some movement however this hasn't worked either! Aluminium rails are being used, with a stainless steel ball bearing. However, the temperature of the apparatus at the point where the ball sits eventually gets so high that the rails begin to deform, preventing the ball from moving.
Does anybody have any ideas how this phenomenon works, or how I could improve the set-up in order to make it work?
Thanks