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8) A hollow cylinder made of platinum has an outer length l1 = 7 cm and...

8) A hollow cylinder made of platinum has an outer length l1 = 7 cm and outer radius of r1 = 5 cm and in inner length l2 = 4 cm and inner radius of r2 = 2 cm; it is whirled on the end of a cord 70 cm in length

A) What is the centripetal force if the centripetal acceleration is 25 rad/s2

B) What is the linear velocity?

C) Is the cylinder speeding up or slowing down?

D) What is the linear distance it travels after 19 revolutions?

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