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Science and Mathematics for Engineering 6th Edition by John Bird
Edition 6ISBN: 978-0367204747Science and Mathematics for Engineering 6th Edition by John Bird
Edition 6ISBN: 978-0367204747 Exercise 7
A screw-jack is being used to support the axle of a lorry, the load on it being 5.6 kN. The screw jack has an effort of effective radius 318 mm and a single-start square thread, having a
lead of 5 mm. Determine the efficiency of the jack if an effort of 70 N is required to raise the car
axle.
lead of 5 mm. Determine the efficiency of the jack if an effort of 70 N is required to raise the car
axle.
Explanation
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Science and Mathematics for Engineering 6th Edition by John Bird
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