A point on the rim of a 0.30-m-radius rotating

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A point on the rim of a 0.30-m-radius rotating wheel has a tangential speed of 4.0 m/s. To find the tangential speed of a point 0.20 m from the center, the relationship between tangential speed and radius is crucial. The formula that relates these two variables is v = rω, where v is tangential speed, r is radius, and ω is angular velocity. Given the known tangential speed and radius, users are encouraged to apply this formula to solve for the unknown speed. The discussion emphasizes the importance of understanding the relationship between radius and tangential speed in rotational motion.
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A point on the rim of a 0.30-m-radius rotating wheel has a tangential speed of 4.0 m/s. What is the tangential speed of a point 0.20 m from the center of the same wheel?

a. 1.0 m/s
b. 1.3 m/s
c. 2.7 m/s
d. 8.0 m/s

i have been trying to do this for hours now.somebody please help
 
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What formula do you know that relates tangential speed to radius?
 
can anyone help me?
 
CompuChip said:
What formula do you know that relates tangential speed to radius?

https://www.physicsforums.com/showthread.php?t=94379. Then, you might want to answer that question. The solution immediately follows (i.e. I cannot make it any easier for you without giving the answer).
 

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