PEARSON ETEXT ENGINEERING MECH & STATS
15th Edition
ISBN: 9780137514724
Author: HIBBELER
Publisher: PEARSON
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Chapter 8, Problem 8FP
F8–8. If the coefficient of static friction at all contacting surfaces is, μs, determine the inclination θ at which the identical blocks, each of weight W, begin to slide.
Prob F8-8
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F8-8. If the coefficient of static friction at all contacting
surfaces is p, determine the inclination 0 at which the
identical blocks, each of weight W, begin to slide.
A
B
F8–8
*8-96. Determine the maximum and the minimum values
of weight W which may be applied without causing the 50-1
block to slip. The coefficient of static friction between the
block and the plane is μ = 0.2, and between the rope and
the drum D is ', = 0.3.
s
D
45°
Prob. 8-96
W
F8-4. If the coefficient of static friction at contact points A
and B is u, = 0.3, determine the maximum force P that can
be applied without causing the 100-kg spool to move.
06 m
0.9 m
B.
Chapter 8 Solutions
PEARSON ETEXT ENGINEERING MECH & STATS
Ch. 8 - F81. Determine the friction developed between the...Ch. 8 - F82. Determine the minimum force P to prevent the...Ch. 8 - Prob. 3FPCh. 8 - F84. If the coefficient of static friction at...Ch. 8 - F85. Determine the maximum force P that can be...Ch. 8 - F86. Determine the minimum coefficient of static...Ch. 8 - F87. Blocks A, B, and C have weights of 50 N, 25...Ch. 8 - F88. If the coefficient of static friction at all...Ch. 8 - Prob. 9FPCh. 8 - Determine the maximum force P the connection can...
Ch. 8 - The mine car and its contents have a total mass of...Ch. 8 - Prob. 4PCh. 8 - The automobile has a mass of 2 Mg and center of...Ch. 8 - The automobile has a mass of 2 Mg and canter of...Ch. 8 - Prob. 9PCh. 8 - Determine the angle at which the applied force P...Ch. 8 - Prob. 12PCh. 8 - The car has a mass of 1.6 Mg and center of mass at...Ch. 8 - The log has a coefficient of state friction of, s...Ch. 8 - The spool of wire having a weight of 300 Ib rests...Ch. 8 - The spool of wire having a weight of 300 Ib rests...Ch. 8 - Prob. 20PCh. 8 - The uniform thin pole has a weight of 30 Ib and a...Ch. 8 - The uniform pole has a weight of 30 Ib and a...Ch. 8 - The friction pawl is pinned at A and rests against...Ch. 8 - Two blocks A and B have a weight of 10 Ib and 6...Ch. 8 - Two blocks A and B have a weight of 10 Ib and 6...Ch. 8 - Determine the smallest force P that must be...Ch. 8 - The man having a weight of 200 Ib pushes...Ch. 8 - The uniform hoop of weight W is subjected to the...Ch. 8 - Determine the maximum horizontal force P that can...Ch. 8 - Determine the minimum force P needed to push the...Ch. 8 - Prob. 41PCh. 8 - Prob. 42PCh. 8 - Prob. 51PCh. 8 - Prob. 52PCh. 8 - Determine the smallest couple moment that can be...Ch. 8 - If P=250 N, determine the required minimum...Ch. 8 - Determine the minimum applied force P required to...Ch. 8 - Prob. 67PCh. 8 - Prob. 68PCh. 8 - Prob. 71PCh. 8 - Prob. 72PCh. 8 - Prob. 73PCh. 8 - Prob. 74PCh. 8 - Prob. 81PCh. 8 - Determine the horizontal force P that must be...Ch. 8 - A 180-lb farmer tries to restrain the cow from...Ch. 8 - The 100-lb boy at A is suspended from the cable...Ch. 8 - Prob. 87PCh. 8 - Determine the force P that must be applied to the...Ch. 8 - Prob. 93PCh. 8 - Prob. 98PCh. 8 - Prob. 99PCh. 8 - Blocks A and B have a mass of 7 kg and 10 kg,...Ch. 8 - The uniform bar AB is supported by a rope that...Ch. 8 - Prob. 102PCh. 8 - A 10-kg cylinder D, which is attached to a small...Ch. 8 - Prob. 106PCh. 8 - The collar bearing uniformly supports an axial...Ch. 8 - The collar bearing uniformly supports an axial...Ch. 8 - The floor-polishing machine rotates at a constant...Ch. 8 - Prob. 110PCh. 8 - Prob. 111PCh. 8 - Prob. 116PCh. 8 - The collar fits loosely around a fixed shaft that...Ch. 8 - Prob. 119PCh. 8 - Prob. 120PCh. 8 - Solve Prob. 8-120 if the force P is applied...Ch. 8 - Prob. 122PCh. 8 - Prob. 123PCh. 8 - Prob. 125PCh. 8 - The bell crank fits loosely into a 0.5-in-diameter...Ch. 8 - The bell crank fits loosely into a 0.5-in-diameter...Ch. 8 - Prob. 129PCh. 8 - R81. The uniform 20-lb ladder rests on the rough...Ch. 8 - R82. The uniform 60-kg crate C rests uniformly on...Ch. 8 - R83. A 35-kg disk rests on an inclined surface for...Ch. 8 - Prob. 4RPCh. 8 - Prob. 6RPCh. 8 - Prob. 7RPCh. 8 - The hand cart has wheels with a diameter of 80 mm....
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- Determine the minimum force P to prevent the 30-kg rod AB from sliding. The contact surface at B is smooth, whereas the coefficient of static friction between the rod and the wall at A is = 0. - 4m -arrow_forwardF8-9. Blocks A and B have a mass of 7 kg and 10 kg, respectively. Using the coefficients of static friction indicated, determine the largest force P which can be applied to the cord without causing motion. There are pulleys at C and D. 300 mm D' 400 mm HAB = 0.3 %3D HA=0.1arrow_forwardF4-18. Determine the minimum coefficient of static friction between the uniform 50-kg spool and the wall so that the spool does not slip. B. 0.6 m- 03 marrow_forward
- 8-25. The uniform pole has a weight of 30 lb and a length of 26 ft. Determine the maximum distance d it can be placed from the smooth wall and not slip. The coefficient of static friction between the floor and the pole is u, = 0.3. B 26 ft Answer 13.4 ft A d-arrow_forward8-103. Blocks A and B have a mass of 100 kg and 150 kg. respectively. If the coefficient of static friction between A and 8 and between 8 and C is, 0.25 and between the ropes and the pegs D and E ',-0.5 determine the smallest force f needed to cause motion of block Bit P = 30 Narrow_forward8-26. The refrigerator has a weight of 180 lb and rests on a tile floor for which us 0.25. If the man pushes horizontally on the refrigerator in the direction shown, determine the smallest magnitude of horizontal force needed to move it. Also, if the man has a weight of 150 lb, determine the smallest coefficient of friction between his shoes and the floor so that he does not slip. -3 ft- -1.5 ft- 4 ft 3 ftarrow_forward
- The spool of wire having a weight of 300 lb rests on the ground at B and against the wall at A. Determine the 3 ft normal force acting on the spool at A if P = 300 Ib. The coefficient of static friction between the spool and the ground at B is µ, = 0.35. The wall at A is smooth. ift B.arrow_forwardThe fork lift has a weight of 2400 lb and a center of gravity at G. If the reat wheels are powered, whereas the front wheels are free to roll, determine the maximum number of 300-lb crates the fork lift can push forward. The coefficient of static friction between the wheels and the ground is μ and between the each crate and the ground He a=1.9ft EA b=3.4ft d=2.3ft Uw=0.3 Uc=0.3 d XXXarrow_forward8-6. The 180-Ib man climbs up the ladder and stops at the position shown after he senses that the ladder is on the verge of slipping. Determine the coefficient of static friction between the friction pad at A and ground if the inclination of the ladder is e = 60° and the wall at B is smooth. The center of gravity for the man is at G. Neglect the weight of the ladder. G 10 ftarrow_forward
- 2 of 8 8-6. The 180-Ib man climbs up the ladder and stops at the position shown after he senses that the ladder is on the verge of slipping. Determine the coefficient of static friction between the friction pad at A and ground if the inclination of the ladder is e = 60° and the wall at B is smooth. The center of gravity for the man is at G. Neglect the weight of the ladder. 10 f 2arrow_forward8-26. The refrigerator has a weight of 180 lb and rests on a tile floor for which us = 0.25. If the man pushes horizontally on the refrigerator in the direction shown, determine the smallest magnitude of horizontal force needed to move it. Also, if the man has a weight of 150 lb, determine the smallest coefficient of friction between his shoes and the floor so that he does not slip. -3 ft- F15 ft- 4 ft 3tarrow_forwardDetermine the horizontal force P to start the 400-N wedge moving to the right. The angle of friction for all contact surfaces is o = 20°. WA = 2000 N WB = 400 N 15°arrow_forward
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