2. The vertical position of the 100-kg block is adjusted by the screw-activated wedge. Calculate the moment M which must be applied to the handle of the screw to raise the block. The single-thread screw has square threads with a mean diameter of 30 mm and advances 10 mm for each complete turn. The coefficient of friction for the screw threads is 0.25, and the coefficient of friction for all mating surfaces of the block and wedge is 0.40. Neglect friction at the ball joint A. 100 kg A 10° Figure 2: The block-wedge-screw system

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
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The vertical position of the 100-kg block is adjusted by the screw-activated wedge. Calculate the moment M which must be applied to the handle of the screw to raise the block. The single-thread screw has square threads with a mean diameter of 30 mm and advances 10 mm for each complete turn. The coefficient of friction for the screw threads is 0.25, and the coefficient of friction for all mating surfaces of the block and wedge is 0.40. Neglect friction at the ball joint A. Note: Please show everything related to the question. Hence, refer to the image for more information for clarity!. On occasions I receive wrong answers!. Kindly please show step by step working out and double check final answers. Please show free body diagram, correct angles and direction. Also forces in correct units. Appreciate your time!. Thanks
2. The vertical position of the 100-kg block is adjusted by the screw-activated wedge. Calculate the
moment M which must be applied to the handle of the screw to raise the block. The single-thread
screw has square threads with a mean diameter of 30 mm and advances 10 mm for each complete
turn. The coefficient of friction for the screw threads is 0.25, and the coefficient of friction for all
mating surfaces of the block and wedge is 0.40. Neglect friction at the ball joint A.
100 kg
A
10°
Figure 2: The block-wedge-screw system
Transcribed Image Text:2. The vertical position of the 100-kg block is adjusted by the screw-activated wedge. Calculate the moment M which must be applied to the handle of the screw to raise the block. The single-thread screw has square threads with a mean diameter of 30 mm and advances 10 mm for each complete turn. The coefficient of friction for the screw threads is 0.25, and the coefficient of friction for all mating surfaces of the block and wedge is 0.40. Neglect friction at the ball joint A. 100 kg A 10° Figure 2: The block-wedge-screw system
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