Posted by **M** on Friday, March 2, 2012 at 9:08am.

In Fig. 10-28, wheel A of radius rA is coupled by belt B to wheel C of radius rC. The angular speed of wheel A is increased from rest at a constant rate α. Find the time needed for wheel C to reach angular speed ω assuming the belt does not slip. (Hint: If the belt does not slip, the linear speeds at the two rims must be equal.) State your answer in terms of the given variables.

FIGURE: imgur . com/QxZR5. gif

(remove spaces and paste)

I tried:

(rA/rC)*α

and

ωC/αC

but said it was wrong.

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