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Rotational dynamics: Rolling of ring and disc from incline

A solid disk and ring of the same mass and radius start from rest at the top of an incline. both of them start from the same vertical height of 0.5m and roll down an incline.

Which of these reach the bottom first? Give reason.

Find the speed of the disk when it reaches the bottom of the incline.

Solution Summary

Comparing angular velocity and accelerations of ring and disc of same mass and radius.