Concept explainers
End A of the 6-kg uniform rod AB rests on the inclined surface, while end B is attached to a collar of negligible mass that can slide along the vertical rod shown. When the rod is at rest, a vertical force P is applied at B, causing end B of the rod to start moving upward with an acceleration of 4 m/s2. Knowing that θ = 35°, determine the force P.
Fig. P16.121 and P16.122
Want to see the full answer?
Check out a sample textbook solutionChapter 16 Solutions
Connect 1 Semester Access Card for Vector Mechanics for Engineers: Statics and Dynamics
Additional Engineering Textbook Solutions
Engineering Mechanics: Statics
Mechanics of Materials (10th Edition)
INTERNATIONAL EDITION---Engineering Mechanics: Statics, 14th edition (SI unit)
Statics and Mechanics of Materials (5th Edition)
Thinking Like an Engineer: An Active Learning Approach (3rd Edition)
Fox and McDonald's Introduction to Fluid Mechanics
- Problem No. 2 Two crates, of mass 65 kg and 125 kg, are in contact and at rest on a horizontal surface. A 650-N force is exerted on the 65-kg crate. If the coefficient of kinetic friction is 0.18, calculate (a) the acceleration of the system, and (b) the force that each crate exerts on the other. 650-N 65 kg 125 kgarrow_forwardTwo identical 4-lb slender rods AB and BC are connected by a pin at B and by the cord AC. The assembly rotates in a vertical plane under the combined effect of gravity and a 6-lb·ft couple M applied to rod AB. Knowing that in the position shown the angular velocity of the assembly is zero, determine (a) the angular acceleration of the assembly, (b) the tension in cord AC.arrow_forward9. A Proell governor has three fly balls, each of mass 4 kg. The lengths of all the arms are 280 mm and distance of each pivot of arm from the axis of rotation is 35 mm. The length of extension of lower arms on which each fly ball is attached is 70 mm, and inclined at 25° to the lower arm. The mass of the sleeve is 50 kg. Knowing that the arms are inclined at 50° to the axis of rotation and frictional force between spindle and sleeve is 45 N, determine the maximum and minimum equilibrium speeds of the governor.arrow_forward
- A garage door is mounted on an overhead rail. The wheels at A and B have rusted so that they do not roll, but rather slide along the track. The coefficient of kinetic friction is 0.55. The distance between the wheels is 2.00 m, and each is 0.50m from the vertical sides of the door. The door is uniform and weighs 850 N. It is pushed to the left at constant speed by a horizontal force F⃗, that is applied as shown in the figure. If the distance h is 1.60 m, what is the vertical component of the force exerted on the wheel A by the track? If the distance h is 1.60 m, what is the vertical component of the force exerted on the wheel B by the track? Find the maximum value hh can have without causing one wheel to leave the track.arrow_forward16.5 A uniform rod BC of mass 4 kg is connected to a collar A by a 250-mm cord AB. Neglecting the mass of the collar and cord, determine (a) the smallest constant acceleration a, for which the cord and the rod will lie in a straight line, (b) the corresponding tension in the cord. 250 mm B 400 mm 350 mm Fig. P16.5 Carrow_forward. 16.5 400 mm A B 250 mm 350 mm PROBLEM 16.5 A uniform rod BC of mass 4 kg is connected to a collar A by a 250-mm cord AB. Neglecting the mass of the collar and cord, determine (a) the smallest constant acceleration a, for which the cord and the rod lie in a straight line, (b) the corresponding tension in the cord.arrow_forward
- Greek engineers had the unenviable task of moving large columns from the quarries to the city. One engineer, Chersiphron, tried several different techniques to do this. One method was to cut pivot holes into the ends of the stone and then use oxen to pull the column. The 4-ft diameter column weighs 12,000 lbs, and the team of oxen generates a constant pull force of 1500 lbs on the center of the cylinder G. Knowing that the column starts from rest and rolls without slipping, determine (a) the velocity of its center G after it has moved 5 ft, (b) the minimum static coefficient of friction that will keep it from slipping.arrow_forwardA 50-lb electric floor polisher is operated on a surface for which the coefficient of kinetic friction is 0.25. Assuming that the normal force per unit area between the disk and the floor is uniformly distributed, determine the magnitude Q of the horizontal forces required to prevent motion of the machine.arrow_forwardProblem #5) A pulley having a moment of inertia of 0.191b-ft-s² is connected to two masses as shown. The masses A and B have linear acceleration of 1.85ft/s² upward and 1.11 ft/s² downward, respectively. Assuming no axle friction, determine (a) the tension forces TA and TB in the cables connecting the masses, and (b) the angular acceleration a of the pulley. 6 in. Include and present the Free Body Diagram and Inertial Response Diagram as part of the solving process. Hint #1: Hint #2: use mA = 0.1553slugs, and mB = 0.3106slugs treat each body separately B 10 lb 10 in. A 5 lbarrow_forward
- The 10-in.-radius brake drum is attached to a larger flywheel which is not shown. The total mass moment of inertia of the flywheel and drum is 22 lb ⋅ ft ⋅ s 2 and the coefficient of kinetic friction between the drum and the brake shoe is 0.41. Knowing that the initial angular velocity is 255 rpm clockwise, determine the force which must be exerted by the hydraulic cylinder at point B if the system is to stop in 85 revolutions. DO NOT ROUND OFF IN THE SOLUTION. ROUND OFF ONLY THE FINAL ANSWERarrow_forward4. A garage door (8 ft by 10 ft) weighs 200-lbs is pulled with a constant 25-lb horizontal force to open it as shown. Assume the door rollers (A & B) are frictionless and the door does not rotate or lift off rollers A & B. G is the center of mass of the door. Determine: a. Reactions forces at each roller support (A & B) b. The constant acceleration of the door. c. The time for the door to move 10 feet. Assume it starts from rest. Draw FBD and write governing equations. Show all work. 8 ft 1 ft 5 ft 4 ft -8 ft 10 ft B 3 ft 25 lbsarrow_forwardSample Problem 16.3 150 mm 30 B F 200 mm 30% D 500 mm The thin plate of mass 8 kg is held in place as shown. Neglecting the mass of the links, determine immediately after the wire has been cut (a) the acceleration of the plate, and (b) the force in each link.arrow_forward
- Elements Of ElectromagneticsMechanical EngineeringISBN:9780190698614Author:Sadiku, Matthew N. O.Publisher:Oxford University PressMechanics of Materials (10th Edition)Mechanical EngineeringISBN:9780134319650Author:Russell C. HibbelerPublisher:PEARSONThermodynamics: An Engineering ApproachMechanical EngineeringISBN:9781259822674Author:Yunus A. Cengel Dr., Michael A. BolesPublisher:McGraw-Hill Education
- Control Systems EngineeringMechanical EngineeringISBN:9781118170519Author:Norman S. NisePublisher:WILEYMechanics of Materials (MindTap Course List)Mechanical EngineeringISBN:9781337093347Author:Barry J. Goodno, James M. GerePublisher:Cengage LearningEngineering Mechanics: StaticsMechanical EngineeringISBN:9781118807330Author:James L. Meriam, L. G. Kraige, J. N. BoltonPublisher:WILEY