Engineering Mechanics: Statics
8th Edition
ISBN: 9781118807330
Author: James L. Meriam, L. G. Kraige, J. N. Bolton
Publisher: WILEY
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Textbook Question
Chapter 6.3, Problem 2P
The 50-kg block rests on the horizontal surface, and a force
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The force P is applied to the 53-kg block when it is at rest. Determine the magnitude and direction of the friction force exerted by the
surface on the block if (a) P = 0, (b) P=185 N, and (c) P=292 N. (d) What value of P is required to initiate motion up the incline? The
static and kinetic coefficients of friction between the block and the incline are ₁-0.24 and U-0.19, respectively. The friction force is
positive if up the incline, negative if down the incline.
Answers:
(a) F-
(c) F=
53 kg
14°
(d) P=
(b) F- i
i
i
23
P=0.24
P₁=0.19
N
N
N
N
6/3 The force P is applied to the 50-kg block when it is at
rest. Determine the magnitude and direction of the
friction force exerted by the surface on the block if
(a) P = 0, (b) P = 200 N, and (c) P = 250 N. (d) What
value of P is required to initiate motion up the
incline? The coefficients of static and kinetic friction
between the block and the incline are , - € 0.25 and
= 0.20, respectively.
50 kg
U
Problem 6/2
15°
20°
H₂ = 0.25
k=0.20
Problem 6/3
The force P is applied to the 37-kg block when it is at rest. Determine the magnitude and direction of the friction force exerted by the
surface on the block if (a) P = 0, (b) P = 107 N, and (c) P = 168 N. (d) What value of P is required to initiate motion up the incline? The
static and kinetic coefficients of friction between the block and the incline are us = 0.19 and k = 0.16, respectively. The friction force is
positive if up the incline, negative if down the incline.
Answers:
(a) F=
37 kg
12°
i
(b) F= i
(c) F= i
(d) P= i
21°
H.= 0.19
H₁ = 0.16
zzz
N
N
N
N
Chapter 6 Solutions
Engineering Mechanics: Statics
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