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April 17, 2014

Homework Help: Physics

Posted by James on Sunday, June 17, 2012 at 5:56pm.

10. A yo-yo is made by wrapping a 2-m long string around a 500-g 10-cm diameter uniform disk. The string is fastened to the ceiling, and the yo-yo is released. What is the tension in the string as the yo-yo falls?
A.9.8N
B.1.6N
C.4.9N
D. 0.49N
E.3.3N

The answer is B. How do I get this answer? I'm having trouble figuring out why tension would be less than (mg). Thank you in advance.

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