A solid disk with a radius of $6 m$ $6 m$ and mass of $8 k g$ $8 kg$ is rotating on a frictionless surface. If $3 W$ $3 W$ of power is used to increase the disk's rate of rotation, what torque is applied when the disk is rotating at $5 H z$ $5 Hz$ ?

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Answer 1 · 2017-02-09T19:48:00

$τ = \frac{3 W}{10 π} \approx 9.55 N \cdot m$ $tau=(3" W")/(10pi)~~9.55N*m$

We are told we have a rotating spinning coin.

![http://www.mariowiki.com/coin]( useruploads.socratic.org )

Step 1. Gather the information that you know and need

Step 2. Determine the formula using the above givens

Step 3. Plug your answer into the formula for torque

$τ = \frac{3 W}{10 π} \approx 9.55 N \cdot m$ $tau=(3" W")/(10pi)~~9.55N*m$

A solid disk with a radius of 6m6 m and mass of 8kg8 kg is rotating on a frictionless surface. If 3W3 W of power is used to increase the disk's rate of rotation, what torque is applied when the disk is rotating at 5Hz5 Hz?