SOLUTION: Consider a spinning CD which has a mass of 15.0 g. If the radius of the CD is 8.3 cm, and if it rotates about its centre at an angular frequency of 44.4 rad/s, what is its rotation

Algebra.Com
Question 1128404: Consider a spinning CD which has a mass of 15.0 g. If the radius of the CD is 8.3 cm, and if it rotates about its centre at an angular frequency of 44.4 rad/s, what is its rotational kinetic energy (in J)? Assume the CD is a solid disk (i.e. ignore the hole in the center.).
Answer by ikleyn(52776)   (Show Source): You can put this solution on YOUR website!
.

For a disk of mass  M  and radius  R,  the moment of inertia  I  is

    I = ..


If the disk is spinning with angular speed   radians per second, its rotational kinetic energy is
    
    K.E. =  =  = ..


What you need to do now is to substitute your data; to take your calculator and to complete calculations on your own.

Be sure to have the mass in kilograms and the radius in meters.


The reference is this link.

https://www.unr.edu/Documents/science/physics/labs/180/11_Rotational_Kinetic_Energy.pdf



RELATED QUESTIONS

AB and CD ARE TWO PARALLEL CHORDS OF A CIRCLE WHICH ARE ON EITHER SIDE OF THE CENTRE.... (answered by Edwin McCravy)
Two chords, AB and CD, intersect in a circle at E. if _AE= 6cm, BE = 8 cm, and CE =... (answered by NaiXLG)
The equation of a circle with centre O(0, 0) is x² + y² = 10. The points C(3, 1) and... (answered by stanbon)
Pleas help me to solve this question: AB and CD are two parallel chords of a circle. If... (answered by Seutip,Edwin McCravy)
If you know that the radius CD = 5 cm, and BC = 3 cm, what is the area of... (answered by Alan3354,ikleyn)
If AB and CD are the two chords of a circle such that AB=6cm and CD= 12 cm , AB andCD... (answered by ankor@dixie-net.com)
2. If the radius of a circle is 15 cm, what is the diameter? A. 7.5 cm B. 20... (answered by Alan3354)
A used CD is a dollar more than one-third the price of a new CD. If a new CD costs $18,... (answered by psbhowmick)
AB and CD are parallel chords of a circle of radius 10cm, their length are 18cm and 5cm... (answered by greenestamps)