# Torque and Force How much torque do you need to apply to a 1kg disk of radius 10cm to get an angular acceleration of 3 rads/s2. How much force do you need to exert on the edge of the disk to achieve this torque? Assume the disk is rotating about an axis through its center perpendicular to its face, and you are applying the force perpendicular to the radius of the desk, as you were spinning thre disk with your hand.

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Torque and Force

How much torque do you need to apply to a 1kg disk of radius 10cm to get an angular acceleration of 3 rads/s2. How much force do you need to exert on the edge of the disk to achieve this torque? Assume the disk is rotating about an axis through its center perpendicular to its face, and you are applying the force perpendicular to the radius of the desk, as you were spinning thre disk with your hand.

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Step 1

The disk is rotating about an axis through its center perpendicular to the face of the disk.

Step 2

The equation for the moment of inertia of a disk rotating about an axis perpendicular to the face of the disk is:

Step 3

Substitute 1kg for M and 10cm ...

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