Experiment of December 23, 2016:

The time to submit an answer is over. You can now view the solution of the experiment.

Solution video:

For technical reasons you need to click twice to first load the video and then start playing it.

Experiment:

Question:

What does Ms. Santa observe when she takes hold of the cotton reel and lets the small ball circle once and the large ball circle once?

A) Only the large ball can lift the small one by its circular motion.

B) Only the small ball can lift the large one by its circular motion.

C) The two balls can lift each other by their circular motion, but the small one has to circle faster than the large one.

D) The two balls can lift each other by their circular motion, but the large one has to circle faster than the small one.

Advice of the day:

After pulling the string through the cotton reel, you need to knot wooden (or other) objects of different weight to the opposite ends of the string. Now let the cotton reel rotate over your head like a lasso. Can you do that?