Wooden Crank Toy
by Ben Rimes
skips
questions

March 19, 2012
How far do each of the wood pieces in the slots travel during one turn of the crank?
Sequel














Is there another shape that will make the handle rotate more smoothly?





How could I make one of those? It must need to be precisely cut and put together.

If the crank is turned smoothly, is there a point where both sliders are stationary?



If we were to graph the position of one of the screws (distance from center) in relation to time, what would the graph look like?





What shape does the end of the crank make...because I notice it does not seem to be a circle?


How many revolutions to get both points back to their original positions?



Is there a relationship between the arc length traveled vs. the horizontal/vertical distance traveled?




Is it a pure conversion of straight line to rotary motion, if I put a light on the knob would it trace out an exact circle?








I have this toy! I tried to make a dynamic sketch of it in Geometers Sketchpad but couldn't do it. Can it be done? How?
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