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A roller having radius 40cm and weight 3000N is to be pulled over a curb...

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A roller having radius 40cm and weight 3000N is to be pulled over a curb of height 20cm as shown in fig 2 by a horizontal force applied at the end of a string wound round the circumference of the roller Find the magnitude of the horizontal force which will just turn the roller over the corner of the rectangular block Also determine the magnitude and reaction at A and B Consider all the surfaces as smooth 40 cm cm 20 cm DW A Fig 2 B Block Ra CO 1

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