Answered: 37.5 mm P(Resultant of distributed…

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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A force P of 70 N is applied by a rider to the front hand brake of a bicycle
(Pis the resultant of an evenly distributed pressure). As the hand brake
pivots at A. a tension T develops in the 460-mm Ions; brake cable (A_e=
1.075 mm²), which elongates by δ 6=0.214 mm. Find the normal stress 8
and strain e in the brake cable.
Brake cable, L = 460 mm
Hand brake pivot A

37.5 mm
P(Resultant
of distributed
pressure)
50 mm
Uniform hand
-100 mm
brake pressure
PROBLEM 1.4-4

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