Two Identical Disks, with Rotational Inertia I (= 1/2 MR²)

question 58

Multiple Choice

Two identical disks, with rotational inertia I (= 1/2 MR²) , roll without slipping across a horizontal floor and then up inclines.Disk A rolls up its incline without sliding.On the other hand, disk B rolls up a frictionless incline.Otherwise the inclines are identical.Disk A reaches a height 12 cm above the floor before rolling down again.Disk B reaches a height above the floor of:

• A)24 cm
• B)18 cm
• C)12 cm
• D)8 cm
• E)6 cm

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