Engineering Mechanics: Statics
8th Edition
ISBN: 9781118807330
Author: James L. Meriam, L. G. Kraige, J. N. Bolton
Publisher: WILEY
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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
The force P is applied to the 61-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 = 258 N, and (c) P = 449 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 Ng = 0.31 and ug = 0.28, respectively. The friction force is
positive if up the incline, negative if down the incline.
61 kg
29
H,= 0.31
H= 0.28
19
The tolerance is ± 1 in the 3rd
significant digit.
(a) F=
i
N
(b) F=
i
(c) F=
i
(d) P=
i
N
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
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.Similar questions
- The 600-lb cable spool is placed on a frictionless spindle that has been driven into the ground. If the force required to start the spool rotating is F = 160 lb, determine the coefficient of friction between the ground and the spool. Neglect the diameter of the spindle compared to the diameter of the spool.arrow_forwardThe 60-lb plank rests on a frictionless roller at A, and the 20-lb triangular support BD. Both bodies are homogenous. The coefficients of static friction are 0.4 at B and 0.3 at D. Determine the largest force P that can be applied to the plank without initiating motion.arrow_forwardThe leather rein used to fasten the horse to the hitching rail weighs 3.5 oz per foot. The coefficient of static friction between the rail and the rein is 0.6. If a 34-lb force acting on the bridle is sufficient to restrain the horse, determine the smallest safe length L for the free end of the rein.arrow_forward
- The 120-kg block A is suspended from a rope that runs around the fixed pegs B and C. The coefficient of static friction between the pegs and the rope is 0.25. Determine the range of the force P for which the system is in equilibrium.arrow_forwardThe 3600-lb car with rear Wheel drive is attempting to tow the 4500-lb crate. The center of gravity of the car is at G, and the coefficients of static friction are 0.6 at B and 0.2 at C. Determine if the crate will slide.arrow_forward(d) P= i Narrow_forward
- 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 = 226 N, and (c) P = 353 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 μs = 0.30 and μk = 0.27, respectively. The friction force is positive if up the incline, negative if down the incline.arrow_forwardThe force Pis applied to the 57-kg block when it is at rest. Determine the magnitude and direction of th friction force exerted by the surface on the block if (a) P = 0, (b) P = 278 N, and (c) P = 405 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 u, = 0.30 and Hg = 0.27, respectively. The friction force is positive up the incline, negative if down the incline. 57 kg 27° H.= 0.30 H = 0.27 19 Answers: (a) F= i ! N (b) F= i ! N (c) F = !N (d) P= i ! Narrow_forwardThe force P is applied to the 61-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 = 239 N, and (c) P = 387 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 = 0.27 and μ = 0.24, respectively. The friction force is positive if up the incline, negative if down the incline. Answers: (a) F= 61 kg 16° i (b) F= i (c) F= i (d) P= i 25 H₂ = 0.27 H = 0.24 z z z Narrow_forward
- The force P is applied to the 500-N 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 = 100 lb, and (c) P = 300 lb. (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, respectivelyarrow_forwardThe force Pis applied to the 52-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 = 165 N, and (c) P = 265 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 u, = 0.20 and Uk = 0.15, respectively. The friction force is positive if up the incline, negative if down the incline. 52 kg 19 H, = 0.20 H = 0.15 13 Answers: (a) F= -115 (b) F= i 41.3 N (c) F= i 136 N (d) P= i 44.9 Narrow_forwardThe force P is applied to the 61-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 = 188 N, and (c) P = 268 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 ug = 0.18 and µ = 0.15, respectively. The friction force is positive if up the incline, negative if down the incline. P 61 kg 17° H= 0.18 HE = 0.15 11 Answers: (a) F= N (b) F = i N (c) F = i (d) P= i Narrow_forward
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