A 240N roller is 1m in diameter.

A 240N roller is 1m in diameter. It is being pulled over a 0:1m curb with a horizontal rope. The roller does not slide on the curb.

a) What is the force required to lift the roller over the curb with the rope attached at the middle? b) What is the force required if instead the rope is instead wrapped around the roller as shown?

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