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1. A cylinder of a wheel and axle having a diameter of 40cm is used to lift a crate of 150N. the force applied to the handle is only 100N, calculate the length of the handle.
2. A wheel of diameter 14cm is fixed with a handle which make a circular path of diameter of 70cm. The weight of 200N is suspended to the wheel.
A. find the moment of 200N.
B. Calculate the effort at the handle to balance the weight. ​


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