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P B 4 m Figure LDR - 69 A 3 m

P B 4 m Figure LDR - 69 A 3 m

Precision Machining Technology (MindTap Course List)
Precision Machining Technology (MindTap Course List)
2nd Edition
ISBN:9781285444543
Author:Peter J. Hoffman, Eric S. Hopewell, Brian Janes
Publisher:Peter J. Hoffman, Eric S. Hopewell, Brian Janes
Chapter8: Computer Numerical Control
Section8.1: Cnc Basics
Problem 3RQ: Briefly describe a ball screw and a linear guide.
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The contact surface at B is smooth, whereas the coefficient of static friction between the rod and the wall at A is 0.2. The rod AB is 30 kg.

1. Determine the maximum value of P (N) to prevent the rod from sliding down (ANSWER: 155) and to prevent the rod from sliding up (ANSWER: 268).

2. If P = 210 N, what is the reaction (N) at A, in N?  (ANSWER: 210.25).

P B 4 m Figure LDR - 69 A 3 m
Transcribed Image Text:P B 4 m Figure LDR - 69 A 3 m
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