Design a suitable wire rope to lift a load of 13 kN of debris from a well 70 m deep. The rope should have a factor of safety equal to 6. The weight of the bucket is 7.5 kN. The load is lifted with a maximum speed of 150 m/min which is attained in 1 second. Find also the stress induced in the rope due to starting with an initial slack of 250 mm. The average tensile strength of the rope may be taken as 590 d2 Newtons (where d is the rope diameter in mm) for 6 x 19 wire rope. The weight of the rope is 18.5 N/m. Take the diameter of the wire (dw) = 0.063d and area of rope A = 0.38 d².
Design a suitable wire rope to lift a load of 13 kN of debris from a well 70 m deep. The rope should have a factor of safety equal to 6. The weight of the bucket is 7.5 kN. The load is lifted with a maximum speed of 150 m/min which is attained in 1 second. Find also the stress induced in the rope due to starting with an initial slack of 250 mm. The average tensile strength of the rope may be taken as 590 d2 Newtons (where d is the rope diameter in mm) for 6 x 19 wire rope. The weight of the rope is 18.5 N/m. Take the diameter of the wire (dw) = 0.063d and area of rope A = 0.38 d².
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Transcribed Image Text:Design a suitable wire rope to lift a load of 13
kN of debris from a well 70 m deep. The rope
should have a factor of safety equal to 6. The
weight of the bucket is 7.5 kN. The load is
lifted with a maximum speed of 150 m/min
which is attained in 1 second. Find also the
stress induced in the rope due to starting
with an initial slack of 250 mm. The average
tensile strength of the rope may be taken as
590 d2 Newtons (where d is the rope
diameter in mm) for 6 x 19 wire rope. The
weight of the rope is 18.5 N/m. Take the
diameter of the wire (dw) = 0.063d and area
of rope A = 0.38 d2.
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