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A hoop of radius 3 m weighs 100 kg. It rolls along a horizontal floor so that at its centre of mass has a speed of 200 mm/sec, . The work required to stop the hoop is | |
A. | 2 J [Wrong Answer] |
B. | 4 J [Correct Answer] |
C. | 6 J [Wrong Answer] |
D. | 8 J [Wrong Answer] |