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.

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

4th Edition

ISBN:9781305501607

Author:Andrew Pytel And Jaan Kiusalaas

Publisher:Andrew Pytel And Jaan Kiusalaas

Chapter7: Dry Friction

Section: Chapter Questions

Problem 7.57P: The square-threaded screw with a pitch of 10 mm and a mean radius of 18 mm drives a gear that has a...

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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.

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