# Angluar acceleration of a computer disk

• cstout
In summary, the average angular acceleration of a computer's hard disk spinning at 7200 rpm, and taking 3.7 s to reach this angular velocity from rest, can be calculated using the equation Wav = (\varthetaf - \varthetai)/(Tf-Ti), where \varthetaf and \varthetai are the final and initial angular velocities, and Tf and Ti are the final and initial times. However, it is important to convert the 7200 rpm to rad/s to get the correct answer.
cstout

## Homework Statement

During normal operation, a computer's hard disk spins at 7200 rpm. If it takes the hard disk 3.7 s to reach this angular velocity starting from rest, what is the average angular acceleration of the hard disk in rad/s2?

## Homework Equations

Wav = $$\vartheta$$f - $$\vartheta$$i/Tf-Ti

cstout said:

## Homework Statement

During normal operation, a computer's hard disk spins at 7200 rpm. If it takes the hard disk 3.7 s to reach this angular velocity starting from rest, what is the average angular acceleration of the hard disk in rad/s2?

## Homework Equations

Wav = $$\vartheta$$f - $$\vartheta$$i/Tf-Ti

you want: Wav = ($$\vartheta$$f - $$\vartheta$$i)/(Tf-Ti)

Do you know what all the variables in this equation mean? It is the right equation so you just have to find out what all the variable are in express them in the right units

I got it now, I didn't convert the 7200 rpm to rad/s

## What is angular acceleration of a computer disk?

Angular acceleration of a computer disk refers to the rate at which the rotational speed of the disk changes over time. It is usually measured in radians per second squared.

## Why is angular acceleration important for a computer disk?

Angular acceleration is important for a computer disk because it affects the performance and functionality of the disk. It determines how quickly the disk can read and write data, which directly impacts the overall speed and efficiency of the computer.

## What factors can affect the angular acceleration of a computer disk?

Several factors can affect the angular acceleration of a computer disk, including the disk's physical properties (such as size and weight), the disk's rotational speed, and any external forces or vibrations acting on the disk.

## How is angular acceleration measured for a computer disk?

Angular acceleration can be measured using various methods, such as using a tachometer to measure the rotational speed of the disk and calculating the change in speed over time. It can also be measured using specialized equipment, such as an accelerometer, which measures the changes in the disk's rotational velocity.

## Can the angular acceleration of a computer disk be improved?

Yes, the angular acceleration of a computer disk can be improved by optimizing the disk's physical properties, such as reducing its weight or increasing its rotational speed. It can also be improved by minimizing external factors that may affect the disk's acceleration, such as reducing vibrations or ensuring proper ventilation for the disk.

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