Help Me Solve Rotational Kinetic Energy Problem

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To solve the rotational kinetic energy problem for a cylinder rolling down a 15-degree incline, apply the principle of energy conservation, considering both translational and rotational kinetic energy. Calculate the change in elevation as the cylinder rolls 80 cm down the incline, which affects its potential energy. Use the moment of inertia for a solid cylinder in the rotational kinetic energy formula. The initial potential energy converts into both translational and rotational kinetic energy as the cylinder descends. Proper application of these concepts will yield the correct rotational kinetic energy.
brad sue
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Hi Please I would like to have some help with this problem:
A cylinder of mass .2 kg rolls without slipping down an inclined plane of 15 degree.
What is its rotational kinetic energy after it rolls 80cm?
I tried the formula W=Kf - Ko but It does not bring me to the solution.
Thank you for our help
 
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Use energy conservation and note that the cylinder has both translational and rotational kinetic energy. You'll need to use a little geometry to determine the change in elevation of the cylinder and don't forget to use the moment of inertia in your rotational KE calculation.
 
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