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A screw jack is used to lift a load of 50 kN through a maximum lift of 200 mm. The material used for a screw is steel of allowable stresses in tension
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27. The efficiency E of a screw jack is given by E- tano tan(+9) where is variable and 4 is some constant angle lying ir . The maximum efficiency is given by (
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The efficiency e of a screw jack is given by e=dfrac{tan theta }{tantheta :}left(theta +aright), where a is a constant. Find theta if this efficiency is to be maximum.Also find the maximum
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Determination of mechanical advantage and efficiency of a simple screw jack (4030)
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