a screw Jack whose pitch is 4.4mm is used to raise a body of mass 800kg through a height of 20cm.the length of the Tommy bar of the Jack is 70cm.if the efficiency of the Jack is 80% calculate the
velocity ratio of the Jack
mechanical advantage of the Jack
effort required in raising the body {g =10m/s,π=22/7}?
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Asked by victor on 17th February, 2019
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