4. The drum of a goods hoist has a mass of 900 kg. It has an effective diameter of 1.5 m and a radius of gyration of 0.6 m. The loaded cage has a mass of 550 kg and its frictional resistance in the vertical line of travel is 270 N. A maximum acceleration of 0.9 m/s² is required. Determine: 1. The necessary driving torque on the drum, 2. The tension in the rope during acceleration, and 3. The power devel- oped at a steady speed of 3.6 m/s. [Ans. 4.64 kN-m; 6.16 kN; 22.3 kW]

4. The drum of a goods hoist has a mass of 900 kg. It has an effective diameter of 1.5 m and a radius of gyration of 0.6 m. The loaded cage has a mass of 550 kg and its frictional resistance in the vertical line of travel is 270 N. A maximum acceleration of 0.9 m/s² is required. Determine: 1. The necessary driving torque on the drum, 2. The tension in the rope during acceleration, and 3. The power devel- oped at a steady speed of 3.6 m/s. [Ans. 4.64 kN-m; 6.16 kN; 22.3 kW]

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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The drum of a goods hoist has a mass of 900 kg. It has an effective diameter of 1.5 m and a radius of
gyration of 0.6 m. The loaded cage has a mass of 550 kg and its frictional resistance in the vertical
line of travel is 270 N. A maximum acceleration of 0.9 m/s² is required. Determine: 1. The necessary
driving torque on the drum, 2. The tension in the rope during acceleration, and 3. The power devel-
oped at a steady speed of 3.6 m/s.
[Ans. 4.64 kN-m; 6.16 kN; 22.3 kW]

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