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
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
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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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.
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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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