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mechanics

Easy

Question

A loop and a disc have same mass and roll without slipping with the same linear velocity . If the total kinetic energy of the loop is 8J, the kinetic energy of the disc must be

8J
16J
6J
4J

The correct answer is: 6J

$KE text of end text loop equals m v squared equals 8 straight J KE text of end text disc equals 3 over 4 mv squared equals 3 over 4 8 equals 6 straight J$

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