The doorstop depicted in Fig. 16-2a has the following dimensions: a = 6 in, b =4 in, c = 1.6 in, wy = 1 in, w2 = 0.8 in, where wz is the depth of the pad into the plane of the paper. (a) For a leftward relative movement of the floor, an actuating force F of 10 lbf, a coef- ficient of friction of 0.4, use a uniform pressure distribution pv. find Rr. Ry. Pav. and the largest pressure Pa- (b) Repeat part a for rightward relative movement of the floor.

International Edition---engineering Mechanics: Statics, 4th Edition
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ISBN:9781305501607
Author:Andrew Pytel And Jaan Kiusalaas
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Chapter7: Dry Friction
Section: Chapter Questions
Problem 7.72P
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R,
Plan view of pad
w2
b.
Friction pad
B
Relative motion
P(u)
Center of
pressure
(a)
Transcribed Image Text:R, Plan view of pad w2 b. Friction pad B Relative motion P(u) Center of pressure (a)
The doorstop depicted in Fig. 16-2a has the following dimensions: a = 6 in, b =4 in,
c = 1.6 in, w = 1 in, wz = 0.8 in, where wz is the depth of the pad into the plane of
the paper.
(a) For a leftward relative movement of the floor, an actuating force F of 10 lbf, a coef-
ficient of friction of 0.4, use a uniform pressure distribution pv. find R. Ry. Pav. and
the largest pressure pa-
(b) Repeat part a for rightward relative movement of the floor.
Transcribed Image Text:The doorstop depicted in Fig. 16-2a has the following dimensions: a = 6 in, b =4 in, c = 1.6 in, w = 1 in, wz = 0.8 in, where wz is the depth of the pad into the plane of the paper. (a) For a leftward relative movement of the floor, an actuating force F of 10 lbf, a coef- ficient of friction of 0.4, use a uniform pressure distribution pv. find R. Ry. Pav. and the largest pressure pa- (b) Repeat part a for rightward relative movement of the floor.
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