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engineering
civil engineering
Engineering Mechanics Statics 12th Edition R. C. Hibbeler - Solutions
Determine the normal force, shear force, and moment at a section passing through point D. take w = 150N/m
Determine the normal force, shear force, and moment acting at a section passing through point C. take P = 8kN
Determine the internal normal force, shear force, and bending moment at pointC.
Solve Prob. 7-24 assuming that each beam has a uniform weight of 150lb/ft.
Determine the internal normal force, shear force, and moment acting at sections passing through points B and C on the curvedrod.
The cantileverd rack is used to support each end of a smooth pipe that has a total weight of 300 lb. determine the normal force, shear force, and moment that acting in the arm at its fixed support A along a verticalsection.
Determine the internal normal force, shear force, and bending moment in the beam at pints D and E. Point E is just to the right of the 4-kip load. Assume A is a roller support, the splice at B is a pin, and C is a fixedsupport.
Determine the internal normal force, shear force, and bending moment at points E and F of theframe
Solve prob. 7.36 for ? = 120o
Draw the shear and moment diagram for thebeam
Draw the shear and bending ? moment diagrams for the beam.
Draw the shear and moment diagram for thebeam.
Draw the shear and moment diagrams for thebeam.
Draw the shear and moment diagram for thebeam
Draw the shear and moment diagrams for thebeam.
Draw the shear and moment diagram for thebeam
Draw the shear and moment diagram for thebeam
Draw the shear and moment diagrams for thebeam
Draw the shear and moment diagram for thebeam.
Draw the shear and moment diagram for thebeam
Draw the shear and moment diagrams for thebeam.
Draw the shear and moment diagrams for thebeam
Draw the shear and moment diagrams for thebeam.
Draw the shear and moment diagrams for thebeam
Draw shear and moment diagrams for thebeam.
Draw the shear and moment diagram for thebeam
Draw the shear and moment diagram for thebeam.
Draw the shear and moment diagrams for thebeam.
Draw the shear and moment diagrams for thebeam.
Draw the shear and moment diagram for thebeam.
Draw the shear and moment diagrams for thebeam.
Determine the tension in each segment of the cable and the cable?s total length.
Determine the maximum tension developed in the cable if it is subjected to a uniform load of 600N/m.
A cable has a weight of 5 lb/ft. If it can span 300 ft and has a sag of 15 ft, determine the length of the cable. The ends of the cable are supported at the same elevation
A Cable has a weight of 2 lb/ft. if it can span 100 ft and has a sag of 12 ft, determine the length of the cable. The ends of the cable are supported from the same elevation.
The cable weighs 6 lb/ft and is 150 ft in length. Determine the sag h so that the cable spans 100 ft. find the minimum tension in thecable.
A telephone line (cable) stretches between two points which are 150 ft apart and at the same elevation. The line sags 5 ft and the cable has a weight of 0.3 lb/ft. determine the length of the cable and the maximum tension in thecable.
A 50-ft cable us suspended between two points a distance of 15 ft apart and at the same elevation. If the minimum tension in the cable is 200 lb, determine the total weight of the cable and the maximum tension developed in the cable
The man picks up the 52-ft chain and holds it just high enough so it is completely off the ground. The chain has points of the attachment A and B that are 50 ft apart. If the chain has a weight of 3 lb/ft, and the man weight 150 lb, determine the force he exerts on the ground. Also, how high h must
Draw the shear and moment diagram for thebeans
Draw the shear and moment diagram for the beansABC
Draw the shear and moment diagrams for thebeam
Determine the minimum horizontal force?P?required to hold the crate from sliding down the plane. The crate has a mass of 50 kg and the coefficient of static friction between the crate and the plane is ?s = 0.25.
Determine the minimum force P required to push the crate up the plane. The crate has a mass of 50 kg and the coefficient of static friction between the crate and the plane is ?s = 0.25.
A horizontal force of P = 100 N is just sufficient to hold the crate from sliding down the plane, and a horizontal force of P = 350 N is required to just push the crate up the plane. Determine the coefficient of static friction between the plane and the crate, and find the mass of thecrate.
If the coefficient of static friction at A is ?s = 0.4 and the collar at B is smooth so it only exerts a horizontal force on the pipe, determine the minimum distance x so that the bracket can support the cylinder of any mass without slipping. Neglect the mass of the bracket.
The 180-lb 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 inclination ? of the ladder if the coefficient of static friction between the friction pad A and the ground is ?s = 0.4. Assume the wall at B is smooth. The
The 180-lb 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 ? = 60o and the wall at B is smooth. The center
The uniform thin pole has a weight of 30 lb and a length of 26 ft. If it is placed against the smooth wall and on the rough floor in the position d = 10 ft, will it remain in this position when it is released? The coefficient of static friction is ?s = 0.3.
If the coefficient of static friction at all contacting surfaces is ?s, determine the inclination ? at which the identical blocks, each of weight W, begin to slide.
The uniform 20-lb ladder rests on the rough floor for which the coefficient of static friction is ?s = 0.8 and against the smooth wall at B. Determine the horizontal force P?the man must exert on the ladder in order to cause it to move.
The coefficients of static and kinetic friction between the drum and brake bar are ?s?= 0.4 and ?k?= 0.3, respectively. If M = 50N ? m and P = 85 N determine the horizontal and vertical components of reaction at the pin O. Neglect the weight and thickness of the brake. The drum has a mass of 25 kg.?
The coefficient of static friction between the drum and brake bar is ?s = 0.4. If the moment M = 35 N ? m, determine the smallest force P that needs to be applied to the brake bar in order to prevent the drum from rotating. Also determine the corresponding horizontal and vertical components of
Determine the minimum coefficient of static friction between the uniform 50-kg spool and the wall so that the spool does notslip.
The spool has a mass of 200 kg and rests against the wall and on the floor. If the coefficient of static friction at B is (?s)B = 0.3, the coefficient of kinetic friction is (?k)B = 0.2, and the wall is smooth, determine the friction force developed at B when the vertical force applied to the cable
The 80-lb boy stands on the beam and pulls on the cord with a force large enough to just cause him to slip. If the coefficient of static friction between his shoes and the beam is (?s)p?= 0.4, determine the reactions at A and B. The beam is uniform and has a weight of 100 lb. Neglect the size of
The 80-lb boy stands on the beam and pulls with a force of 40 lb. If (?s)D = 0.4, determine the frictional force between his shoes and the beam and the reactions at A and B. The beam is uniform and has a weight of 100 lb. Neglect the size of the pulleys and the thickness of the beam.
The tongs are used to lift the 150-kg crate, whose center of mass is at G. Determine the least coefficient of static friction at the pivot blocks so that the crate can belifted.
Two blocks A and B have a weight of 10 lb and 6 lb, respectively. They are resting on the incline for which the coefficients of static friction are ?A = 0.15 and ?B = 0.25. Determine the incline angle for which both blocks begin to slide. Also find the required stretch or compression in the
Two blocks A and B have a weight of 10 lb and 6 lb, respectively. They are resting on the incline for which the coefficients of static friction are ?A = 0.15 and ?B = 0.25. Determine the angle ? which will cause motion of one of the blocks. What is the friction force under each of the blocks when
Crates A and B weigh 200 lb and 150 lb, respectively. They are connected together with a cable and ?placed on the inclined plane. If the angle ? is gradually increased, determine ? when the crates begin to slide. The coefficients of static friction between the crates and the plane are ?A = 0.25 and
A man attempts to support a stack of books horizontally by applying a compressive force of F = 120N to the ends of the stack with his hands. If each book has a mass of 0.95 kg, determine the greatest number of books that can be supported in the stack. The coefficient of static friction between the
The paper towel dispenser carries two rolls of paper. The one in use is called the stub roll A and the other is the fresh roll B. They weigh 2 lb and 5 lb, respectively. If the coefficients of static friction at the points of contact C and D are (?s)C = 0.2 and (?s)D = 0.5, determine the initial
The drum has a weight of 100 lb and rests on the floor for which the coefficient of static friction is ?s = 0.6. If a = 2 ft and b = 3 ft, determine the smallest magnitude of the force P that will cause impending motion of the drum.
The drum has a weight of 100 lb and rests on the floor for which the coefficient of static friction is ?s = 0.5. If a = 3 ft and b = 4 ft, determine the smallest magnitude of the force P that will cause impending motion of the drum.
The refrigerator has a weight of 180 lb and rests on a tile floor for which ?s = 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
The refrigerator has a weight of 180 lb and rests on a tile floor for which ?s = 0.25.Also, the man has a weight of 150 lb and the coefficient of static friction between the floor and his shoes is ?s = 0.6. If he pushes horizontally on the refrigerator, determine if he can move it. If so, does the
Determine the minimum force P needed to push the two 75-kg cylinders up the incline. The force acts parallel to the plane and the coefficients of static friction of the contacting surfaces are ?A = 0.3, ?B = 0.25, and ?C = 0.4. Each cylinder has a radius of 150 mm.
If the center of gravity of the stacked tables is at G, and the stack weighs 100 lb, determine the smallest force P the boy must push on the stack in order to cause movement. The coefficient of static friction at A and B is ?s = 0.3.The tables are locked together.
The tractor has a weight of 8000 lb with center of gravity at G. Determine if it can push the 550-lb log up the incline. The coefficient of static friction between the log and the ground is ?s = 0.5, and between the rear wheels of the tractor and the ground ?s? = 0.8. The front wheels are free to
The tractor has a weight of 8000 lb with center of gravity at G. Determine the greatest weight of the log that can be pushed up the incline. The coefficient of static friction between the log and the ground is ?s = 0.5, and between the rear wheels of the tractor and the ground ??s = 0.7. The front
The 50-kg uniform pole is on the verge of slipping at A when ? = 45o. Determine the coefficient of static friction at A.
A force of P = 20 lb is applied perpendicular to the handle of the gooseneck wrecking bar as shown. If the coefficient of static friction between the bar and the wood is ?s = 0.5, determine the normal force of the tines at A on the upper board. Assume the surface at C is smooth.
The thin rod has a weight W and rests against the floor and wall for which the coefficients of static friction are ?A and ?B, respectively. Determine the smallest value of ? for which the rod will not move.
A roll of paper has a uniform weight of 0.75 lb and is suspended from the wire hanger so that it rests against the wall. If the hanger has a negligible weight and the bearing at O can be considered frictionless, determine the force P needed to start turning the roll if ? = 30o. The coefficient of
A roll of paper has a uniform weight of 0.75 lb and is suspended from the wire hanger so that it rests against the wall. If the hanger has a negligible weight and the bearing at O can be considered frictionless, determine the minimum force P and the associated angle needed to start turning the
If the coefficient of static friction between the chain and the inclined plane is ?s = tan ?, determine the overhang length b so that the chain is on the verge of slipping up the plane. The chain weighs w per unit length.
Determine the maximum height h in meters to which the girl can walk up the slide without supporting herself by the rails or by her left leg. The coefficient of static friction between the girl?s shoes and the slide is ?s = 0.8.
If the coefficient of static friction at B is ?s = 0.3, determine the largest angle and the minimum coefficient of static friction at A so that the roller remains self-locking, regardless of the magnitude of force P applied to the belt. Neglect the weight of the roller and neglect friction between
If ? = 30o, determine the minimum coefficient of static friction at A and B so that the roller remains self-locking, regardless of the magnitude of force P applied to the belt. Neglect the weight of the roller and neglect friction between the belt and the vertical surface.
The clamp is used to tighten the connection between two concrete drain pipes. Determine the least coefficient of static friction at A or B so that the clamp does not slip regardless of the force in the shaftCD.
The coefficient of static friction between the 150-kg crate and the ground is ?s = 0.3, while the coefficient of static friction between the 80-kg man?s shoes and the ground is ??s = 0.4. Determine if the man can move the crate
If the coefficient of static friction between the crate and the ground is ?s = 0.3, determine the minimum coefficient of static friction between the man?s shoes and the ground so that the man can move the crate.
The 3-Mg rear-wheel-drive skid loader has a center of mass at G. Determine the largest number of crates that can be pushed by the loader if each crate has a mass of 500 kg. The coefficient of static friction between a crate and the ground is ?s = 0.3, and the coefficient of static friction between
Block C has a mass of 50 kg and is confined between two walls by smooth rollers. If the block rests on top of the 40-kg spool, determine the minimum cable force P needed to move the spool. The cable is wrapped around the spool?s inner core. The coefficients of static friction at A and B are ?A =
Block C has a mass of 50 kg and is confined between two walls by smooth rollers. If the block rests on top of the 40-kg spool, determine the required coefficients of static friction at A and B so that the spool slips at A and B when the magnitude of the applied force is increased to P = 300N.
The 3-Mg four-wheel-drive truck (SUV) has a center of mass at G. Determine the maximum mass of the log that can be towed by the truck. The coefficient of static friction between the log and the ground is ?s = 0.8, and the coefficient of static friction between the wheels of the truck and the ground
A 3-Mg front-wheel-drive truck (SUV) has a center of mass at G. Determine the maximum mass of the log that can be towed by the truck. The coefficient of static friction between the log and the ground is ?s = 0.8, and the coefficient of static friction between the front wheels of the truck and the
If the coefficients of static friction at contact points A and B are ?s = 0.3 and ??s = 0.4 respectively, determine the smallest force P that will cause the 150-kg spool to have impending motion.
If the coefficients of static friction at contact points A and B are ?s = 0.4 and ??s = 0.2 respectively, determine the smallest force P that will cause the 150-kg spool to have impending motion.
The carpenter slowly pushes the uniform board horizontally over the top of the saw horse. The board has a uniform weight of 3lb/ft, and the saw horse has a weight of 15 lb and a center of gravity at G. Determine if the saw horse will stay in position, slip, or tip if the board is pushed forward
The carpenter slowly pushes the uniform board horizontally over the top of the saw horse. The board has a uniform weight of 3 lb/ft, and the saw horse has a weight of 15 lb and a center of gravity at G. Determine if the saw horse will stay in position, slip, or tip if the board is pushed forward
If the 75-lb girl is at position d = 4 ft, determine the minimum coefficient of static friction ?s at contact points A and B so that the plank does not slip. Neglect the weight of the plank
If the coefficient of static friction at the contact points A and B is ?s = 0.4, determine the minimum distance d where a 75-lb girl can stand on the plank without causing it to slip. Neglect the weight of the plank.
If each box weighs 150 lb, determine the least horizontal force P that the man must exert on the top box in order to cause motion. The coefficient of static friction between the boxes is ?s = 0.5, and the coefficient of static friction between the box and the floor is ??s = 0.2.
If each box weighs 150 lb, determine the least horizontal force P that the man must exert on the top box in order to cause motion. The coefficient of static friction between the boxes is ?s = 0.65, and the coefficient of static friction between the box and the floor is ??s = 0.35.
If the coefficient of static friction between the collars A and B and the rod is ?s = 0.6, determine the maximum angle for the system to remain in equilibrium, regardless of the weight of cylinder D. Links AC and BC have negligible weight and are connected together at C by a pin.
If ? = 15o, determine the minimum coefficient of static friction between the collars A and B and the rod required for the system to remain in equilibrium, regardless of the weight of cylinder D. Links AC and BC have negligible weight and are connected together at C by a pin.
Each of the cylinders has a mass of 50 kg. If the coefficients of static friction at the points of contact are ?A = 0.5, ?B = 0.5, ?C = 0.5,and ?D = 0.6, determine the smallest couple moment M needed to rotate cylinder E.
Blocks A, B, and C have weights of 50 lb, 25 lb, and 15 lb, respectively. Determine the smallest horizontal force P that will cause impending motion. The coefficient of static friction between A and B is ?s = 0.3, between B and C, ??s = 0.4, and between block C and the ground ???s = 0.35,
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