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2. The large diameter and face of the disk of a multiple disk clutch are 255 mm and 25 mm respectively. The helical compression spring used to engage the clutch has 9 ½ effective coils of 10 mm steel wire. The outer coil diameter is 80 mm. The free length of the spring is 185 mm. When in place with clutch engaged, its length is 130 mm. Assuming that there are 10 pairs of friction surface in contact, that the motor runs at 1200 rpm, with coefficient of friction on contact surface f= 0.15. Let the spring modulus of elasticity be 80GN/m?. Determine the axial force available for the clutch. a. 1688 kN c. 1458 kN b. 1534 kN d. 1258 kN

2. The large diameter and face of the disk of a multiple disk clutch are 255 mm and 25 mm respectively. The helical compression spring used to engage the clutch has 9 ½ effective coils of 10 mm steel wire. The outer coil diameter is 80 mm. The free length of the spring is 185 mm. When in place with clutch engaged, its length is 130 mm. Assuming that there are 10 pairs of friction surface in contact, that the motor runs at 1200 rpm, with coefficient of friction on contact surface f= 0.15. Let the spring modulus of elasticity be 80GN/m?. Determine the axial force available for the clutch. a. 1688 kN c. 1458 kN b. 1534 kN d. 1258 kN

Elements Of Electromagnetics
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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42. The large diameter and face of the disk of a multiple disk clutch are 255 mm and 25 mm respectively. The helical compression spring used to engage the clutch has 9 ½ effective coils of 10 mm steel wire. The outer coil diameter is 80 mm. The free length of the spring is 185 mm. When in place with clutch engaged, its length is 130 mm. Assuming that there are 10 pairs of friction surface in contact, that the motor runs at 1200 rpm, with coefficient of friction on contact surface f= 0.15. Let the spring modulus of elasticity be 80GN/m?. Determine the axial force available for the clutch. c. 1458 kN d. 1258 kN a. 1688 kN b. 1534 kN
Transcribed Image Text:42. The large diameter and face of the disk of a multiple disk clutch are 255 mm and 25 mm respectively. The helical compression spring used to engage the clutch has 9 ½ effective coils of 10 mm steel wire. The outer coil diameter is 80 mm. The free length of the spring is 185 mm. When in place with clutch engaged, its length is 130 mm. Assuming that there are 10 pairs of friction surface in contact, that the motor runs at 1200 rpm, with coefficient of friction on contact surface f= 0.15. Let the spring modulus of elasticity be 80GN/m?. Determine the axial force available for the clutch. c. 1458 kN d. 1258 kN a. 1688 kN b. 1534 kN
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