Three objects, a disk, a spherical shell and ahoop of same mass, M=10.0 kg, and

Question

Three objects, a disk, a spherical shell and ahoop of same mass, M=10.0 kg, and

same radius, R=5.0 cm, are released at restfrom the top of an incline which makes an

angle of 30o with horizon.The length of the incline is 10.0 m.

   a) What is the speed of eachobject when they reach down the incline?

   b) What is their angularvelocity at the end of the incline?

   c) What is the ratio ofrotational kinetic energy of each object to itstranslational

   kineticenergy?

   d) Which one reaches firstdown the incline? Explain why?

Explanation / Answer

In general

   c) What isthe ratio of rotational kinetic energy of each object to itstranslational

   kineticenergy?

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