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engineering
mechanical engineering

Questions and Answers of Mechanical Engineering

Each of the frames shown consists of two L-shaped members connected by two rigid links. For each frame, determine the reactions at the supports and indicate whether the frame is rigid.
Each of the frames shown consists of two L-shaped members connected by two rigid links. For each frame, determine the reactions at the supports and indicate whether the frame is rigid.
Each of the frames shown consists of two L-shaped members connected by two rigid links. For each frame, determine the reactions at the supports and indicate whether the frame is rigid.
The shear shown is used to trim electronic-circuit-board laminates. Knowing that P = 400 N, determine(a) The vertical component of the force exerted on the shearing blade at D,(b) The reaction at C.
The shear shown is used to trim electronic-circuit-board laminates. Neglecting the thickness of the shearing blade and knowing that a vertical 3-kN shearing force at E is required to cut the
The press shown is used to emboss a small seal at E. Knowing that P = 250 N, determine(a) The vertical component of the force exerted on the seal,(b) The reaction at A.
The press shown is used to emboss a small seal at E. Knowing that the vertical component of the force exerted on the seal must be 900 N, determine(a) The required vertical force P,(b) The
The control rod CE passes through a horizontal hole in the body of the toggle clamp shown. Determine(a) The force Q required to hold the clamp in equilibrium,(b) The corresponding force in link BD.
The double-toggle latching mechanism shown is used to hold member G against the support. Knowing that α = 60°, determine the force exerted on G.
The double-toggle latching mechanism shown is used to hold member G against the support. Knowing that α = 75°, determine the force exerted on G.
The double-toggle mechanism shown is used in a punching machine. Knowing that links AB and BC are each of length 6 in., determine the couple M required to hold the system in equilibrium when
The double-toggle mechanism shown is used in a punching machine. Knowing that links AB and BC are each of length 6 in. and that M = 660 lb ∙ in., determine the angle φ if the system is in
A force P of magnitude 160 N is applied to the slider of the four-bar slider mechanism shown. For each of the two given positions, determine the couple M required to hold the system in equilibrium.
A couple M of magnitude 6 N ˆ™ m is applied to the input link of the four-bar slider mechanism shown. For each of the two given positions, determine the force P required to hold the system
Arm BCD is connected by pins to crank AB at B and to a collar at C. Neglecting the effect of friction, determine the couple M required to hold the system in equilibrium when θ = 0.
Arm BCD is connected by pins to crank AB at B and to a collar at C. Neglecting the effect of friction, determine the couple M required to hold the system in equilibrium when θ = 45°.
Two rods are connected by a slider block as shown. Neglecting the effect of friction, determine the couple MA required to hold the system in equilibrium.
Two rods are connected by a slider block as shown. Neglecting the effect of friction, determine the couple e MA required to hold the system in equilibrium.
Rod CD is attached to the collar D and passes through a collar welded to end B of lever AB. Neglecting the effect of friction, determine the couple M required to hold the system in equilibrium when
Rod CD is attached to the collar D and passes through a collar welded to end B of lever AB. Neglecting the effect of friction, determine the couple M required to hold the system in equilibrium when
A small barrel having a weight of 250 lb is lifted by a pair of tongs as shown. Knowing that a = 5in, determine the forces exerted at B and D on tong ABD
The tongs shown are used to apply a total upward force of 45Kn on a pipe cap. Determine the forces exerted at D and F on tong ADF.
The pallet puller shown is used to pull a loaded pallet to the rear of a truck. Knowing that P = 2.1kN, determine the forces exerted at G and H on tong FGH.
The drum lifter shown is used to lift a steel drum. Knowing that the weight of the drum and its contents is 110 lb, determine the forces exerted at F and H on member DFH.
A hand-operated hydraulic cylinder has been designed for use where space is severely limited. Determine the magnitude of the force exerted on the piston at D when two 90-lb forces are applied as
The tool shown is used to crimp terminals onto electric wires. Knowing that a worker will apply forces of magnitude P = 135 N to the handles, determine the magnitude of the crimping forces that will
The compound-lever pruning shears shown can be adjusted by placing pin A at various ratchet positions on blade ACE. Knowing that 1.5-kN vertical forces are required to complete the pruning of a small
A locking C-clamp is used to clamp two pieces of 1/4-in. steel plate. Determine the magnitude of the gripping forces produced when two 30-lb forces are applied as shown.
Determine the force P which must be applied to the toggle BCD to maintain equilibrium in the position shown.
In the locked position shown, the toggle clamp exerts at A a vertical 270-lb force on the wooden block, and handle CF rests against the stop at G. Determine the force P required to release the clamp.
The bone rongeur shown is used in surgical procedures to cut small bones. Determine the magnitude of the forces exerted on the bone at E when two 100-N forces are applied as shown.
A lopping pruner is used to cut a small branch at F. Handles AD and BE pivot about bolt B and blade AC pivots about fixed bolt A while bolt C can slide freely in the slot of handle BE. Determine the
The telescoping arm ABC is used to raise a worker to the elevation of overhead electric and telephone wires. For the extension shown, the center of gravity of the 1400-lb arm is located point G. The
The position of the spindle DE of a lift truck is partially controlled by two identical linkage-and-hydraulic-cylinder systems, only one of which is shown. A 3000-lb spool of electric cable is held
The telescoping arm ABC is used to provide an elevated platform for construction workers. The workers and the platform together have a mass of 240 kg and have a combined center of gravity located
A 500-kg concrete slab is supported by a chain and sling attached to the bucket of the front-end loader shown. The action of the bucket is controlled by two identical mechanisms, only one of which is
In the planetary gear system shown, the radius of the central gear A is a = 24 mm, the radius of the planetary gears is b, and the radius of the outer gear E is (a + 2b). A clockwise couple of
Gears A and D are rigidly attached to horizontal shafts that are held by frictionless bearings. Determine(a) The couple 0 M that must be applied to shaft DEF to maintain equilibrium,(b) The reactions
Two shafts AC and CF, which lie in the vertical xy plane, are connected by a universal joint at C. The bearings at B and D do not exert any axial force. A couple of magnitude 50 N ˆ™ m
Solve Prob. 6.153 assuming that the arm of the crosspiece attached to shaft CF is vertical.
The large mechanical tongs shown are used to grab and lift a thick 1500-lb steel slab HJ. Knowing that slipping does not occur between the tong grips and the slab at H and J, determine the components
Determine the force in member FG and in each of the members located to the right of member FG for the scissor roof truss shown. State whether each member is in tension or compression.
Determine the force in each member of the truss shown. State whether each member is in tension or compression.
A pitched flat roof truss is loaded as shown. Determine the force in members CE, DE, and DF.
A stadium roof truss is loaded as shown. Determine the force in members AB, AG, and FG.
Determine the force in number AF and EJ of the truss shown when P = Q = 2 kips.
For the frame and loading shown, determine the components of all forces acting on member ABC.
Knowing that the pulley has a radius of 1.25 in., determine the components of the reactions at B and E.
Knowing g that P = 15 N and Q = 65 N, determine the components of the forces exerted(a) On member BCDF at C and D,(b) On member ACEG at E.
For the system and loading shown, determine(a) The force P required for equilibrium,(b) The corresponding force in member BD,(c) The corresponding reaction at C.
Determine the magnitude of the gripping forces exerted along line a on the nut when two 240-N forces are applied to the handles as shown. Assume that pins A and D slide freely in slots cut in the
The garden shears shown consist of two blades and two handles. The two handles are connected by pin C and the two blades are connected by pin D. The left blade and the right handle are connected by
For the frame and loading of Prob. 6.99, determine the internal forces at a point J located halfway between points B and E.
For the frame and loading of Prob. 6.78, determine the internal forces at point J.
For the frame and loading of Prob. 6.82, determine the internal forces at point J.
For the frame and loading of Prob. 6.85 b, determine the internal forces at point B.
Determine the internal forces at point J of the structure shown.
Determine the internal forces at point K of the structure shown.
A half section of pipe rests on a horizontal surface as shown, knowing that the half section of the pipe has a mass of 9 kg, and neglecting friction between the pipe and the surface, determine the
A half section of pipe rests on a horizontal surface as shown knowing that the half section of the pipe has a mass of 9 kg, and neglecting friction between the pipe and the surface, neglecting .
A rod is bent into a circular arc of radius 4 in. as shown. For the given loading, determine the internal forces at point J when 30 Î¸ = °.
A rod is bent into a circular arc of radius 4 in. as shown. For the given loading, determine(a) The location at which the value of the bending moment is maximum,(b) The internal forces at that point.
Two members, each consisting of straight and 8.4-in.-radius quarter circle portions, are connected as shown and support a 120-lb load at D. Determine the internal forces at point J.
Two members, each consisting of straight and 8.4-in.-radius quarter circle portions, are connected as shown and support a 120-lb load at D. Determine the internal forces at point K.
The axis of the curved member AB is a parabola with its vertex at A. If a vertical load P of magnitude 1.8kN is applied at A, determine the internal forces at J when h = 240 mm, L = 800 mm, and a =
Knowing that the axis of the curved member AB is a parabola with its vertex at A, determine the magnitude and location of the maximum bending moment.
Knowing that the radius of each pulley is 200 mm and neglecting friction, determine the internal forces at point J of the frame shown.
Knowing that the radius of each pulley is 200 mm and neglecting friction, determine the internal forces at point K of the frame shown.
Knowing that the radius of each pulley is 125 mm and neglecting friction, determine the internal forces at point J of the frame shown.
Knowing that the radius of each pulley is 125 mm and neglecting friction, determine the internal forces at point K of the frame shown.
A 5.6-in.-diameter pipe is supported every 10 ft by a small frame consisting of two members as shown. Knowing that the combined weight per unit length of the pipe and its contents is 18.5 lb/ft and
A 5.6-in.-diameter pipe is supported every 10 ft by a small frame consisting of two members as shown. Knowing that the combined weight per unit length of the pipe and its contents is 18.5 lb/ft and
A force P is applied to a bent rod which is supported by a roller and a pin and bracket. For each of the three cases shown, determine the internal forces at point J.
A force P is applied to a bent rod which is supported by a roller and a pin and bracket. For each of the three cases shown, determine the internal forces at point J.
A rod of weight W and uniform cross section is bent into a quarter circle and is supported as shown. Determine the bending moment at point J when Î¸ = 30°.
A rod of weight W and uniform cross section is bent into a quarter circle and is supported as shown. Determine the bending moment at point J when θ = 30°.
For the rod of Prob. 7.23, determine the location and magnitude of the maximum bending moment.
For the rod of Prob. 7.24, determine the location and magnitude of the maximum bending moment.
A rod of weight W and uniform cross section is bent into the circular arc of radius r shown. Determine the bending moment at point J when θ = 30°.
A rod of weight W and uniform cross section is bent into the circular arc of radius r shown. Determine the bending moment at point J when θ = 120 °.
For the beam and loading shown,(a) Draw the shear and bending-moment diagrams,(b) Determine the maximum absolute values of the shear and bending moment.
For the beam and loading shown,(a) Draw the shear and bending-moment diagrams,(b) Determine the maximum absolute values of the shear and bending moment.
For the beam and loading shown,(a) Draw the shear and bending-moment diagrams,(b) Determine the maximum absolute values of the shear and bending moment.
For the beam and loading shown,(a) Draw the shear and bending-moment diagrams,(b) Determine the maximum absolute values of the shear and bending moment.
For the beam and loading shown,(a) Draw the shear and bending-moment diagrams,(b) Determine the maximum absolute values of the shear and bending moment.
For the beam and loading shown,(a) Draw the shear and bending-moment diagrams,(b) Determine the maximum absolute values of the shear and bending moment.
For the beam and loading shown,(a) Draw the shear and bending-moment diagrams,(b) Determine the maximum absolute values of the shear and bending moment.
For the beam and loading shown,(a) Draw the shear and bending-moment diagrams,(b) Determine the maximum absolute values of the shear and bending moment.
For the beam and loading shown,(a) Draw the shear and bending-moment diagrams,(b) Determine the maximum absolute values of the shear and bending moment.
For the beam and loading shown,(a) Draw the shear and bending-moment diagrams,(b) Determine the maximum absolute values of the shear and bending moment.
For the beam and loading shown,(a) Draw the shear and bending-moment diagrams,(b) Determine the maximum absolute values of the shear and bending moment.
For the beam and loading shown,(a) Draw the shear and bending-moment diagrams,(b) Determine the maximum absolute values of the shear and bending moment.
Assuming the upward reaction of the ground on beam AB to be uniformly distributed,(a) Draw the shear and bending-moment diagrams,(b) Determine the maximum absolute values of the shear and bending
Assuming the upward reaction of the ground on beam AB to be uniformly distributed,(a) Draw the shear and bending-moment diagrams,(b) Determine the maximum absolute values of the shear and bending
Assuming the upward reaction of the ground on beam AB to be uniformly distributed,(a) Draw the shear and bending-moment diagrams,(b) Determine the maximum absolute values of the shear and bending
Assuming the upward reaction of the ground on beam AB to be uniformly distributed and knowing that a = 0.3m,(a) Draw the shear and bending moment diagrams,(b) Determine the maximum absolute values of
Draw the shear and bending-moment diagrams for the beam AB, and determine the maximum absolute values of the shear and bending moment.
Draw the shear and bending-moment diagrams for the beam AB, and determine the maximum absolute values of the shear and bending moment.
Two short angle sections CE and DF are bolted to the uniform beam AB of weight 900 lb, and the assembly is temporarily supported by the vertical cables EG and FH as shown. A second beam resting on
Solve Prob. 7.47 when a = 1.8 ft. Problem 7.47: Two short angle sections CE and DF are bolted to the uniform beam AB of weight 900 lb, and the assembly is temporarily supported by the vertical cables

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