Rolling Wheel
Level
2
Which of the pictures shows the movement of the center of the wheel as it goes over the zig-zag?
A
C
D
E
B
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1 solution
When the wheel touches the top of the curve, it pivots over the top of the 'spike', making a curve. At the dip, it cannot curve, so it is pointed. This is most like ( E ) .
Note: I did not make this problem; it is from a math contest.