<http://www.youtube.com/watch?v=u4EZ0BBM9mc>. the video is called \"final video

Question

<http://www.youtube.com/watch?v=u4EZ0BBM9mc>.

the video is called "final video circus"

A. explain using physics principles, iwth a diagram, how the acrobats can bring the twisting wheel to a stop about the pivot point and there remain.

B. in cooperation, the acrobats can move the entire wheel from within their cages. the wheel and everyone within it gains considerable energy of motion. where does this energy come from? what are the energy transfers/transformations, and by what means?

C. sometimes the acrobats seem to float inside their cages or appear weightless. what's up?

D. how or why do the acrobats "stick" to the top if their cages sometimes? desribe briefly ysing a simple force diagram focusing on the acrobats.

E. approx what is the max frequency of circular motion?

Explanation / Answer

motion due to internal forces can only be created in presence of friction, i.e the external force friction is producing the motion.

here the motion of bodies are too complex.

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