Centripetal Acceleration Problem HELP

AI Thread Summary
Centripetal acceleration is calculated using the formula a_c = v^2 / r. In this case, the diameter of the bicycle wheel is 70 cm, which converts to a radius of 0.35 m. When using the velocity of 7.0 m/s, the calculation yields 140 m/s². However, the expected answer is 180 m/s², indicating a potential error in unit conversion or radius calculation. It’s crucial to ensure all measurements are in consistent units for accurate results.
Sucks@Physics
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I don't know what I'm doing wrong on this one...

What is the centripetal acceleration of a point on the perimeter of a bicycle wheel of diameter 70cm when the bike is moving 7.0m/s.

isn't centripetal acceleration just v^2 / r?

I get 140m/s^2, but the answer is 180m/s^2
 
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did you convert 70 cm into metres? And also 70 cm is the diametre, to get the radius you hve to divide the Diametre by 2..
 
yea i did. .35 = radius 7=velocity 7^2/.35 = 140m/s^2
 
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