Banked turns: slot car around an oval track

A slot car travels around an oval track. One curve is flat, and the other banked. At ‘low’ speed, the car successfully navigates both turns. By switching to ‘high’ speed, the car makes it through the banked turn, but tumbles off the flat section.
UCB Index: 
A+0+52
PIRA Index: 
1D50.60
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