Calculating Centripetal Acceleration of a 7200 RPM Hard Drive

AI Thread Summary
To calculate the centripetal acceleration of a hard drive spinning at 7200 RPM with a diameter of 3.51 cm, first convert the diameter to radius, resulting in 0.01755 meters. The velocity can be derived from the RPM by calculating the circumference of the disk, which is essential for determining the linear velocity. One revolution corresponds to one circumference, and the formula for centripetal acceleration is ac = v²/r. Understanding these conversions and formulas is crucial for solving the problem accurately.
goracheski
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Homework Statement


The hard drives of many desktop computers spin at a maximum rate of 7200 rpm. If the diameter of the spinning disk in the harddrive is 3.51 cm, calculate the magnitude of the centripetal acceleration on the outside radius of the disk.


Homework Equations


ac=v2/r


The Attempt at a Solution


r=0.01755 meters
but i don't know how to get the velocity from rpms
 
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hi goracheski! :smile:
goracheski said:
… i don't know how to get the velocity from rpms

one revolution = one circumference …

how long is a circumference? :wink:​
 

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