A screw jack with a pitch 2mm is used to lift a load 5000kg if the efficiency of the jack is 90% calculate the frictional force that must be overcome if the tommy bar is 90cm and the load is lofted over a height of 30cm
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A screw jack with a pitch 2mm is used to lift a load 5000kg if the efficiency of the jack is 90% calculate the frictional force that must be overcome if the tommy bar is 90cm and the load is lofted over a height of 30cm