The principles of a differential chain block are indicated

Determine the force in each member of the truss and state if the members are in tension or compression. Set P1 = 800 lb and P2 = 400 lb

Determine the force on each member of the truss and state if the members are in tension or compression. Set P1 = 500 lb and P2 = 100 lb.

Determine the force in each member of the truss, and state if the members are in tension or compression. Set u = 0

Determine the force in each member of the truss, and state if the members are in tension or compression. Set u = 30 .

Determine the force in each member of the truss, and state if the members are in tension or compression.

Determine the force in each member of the truss, and state if the members are in tension or compression.

Determine the force in each member of the Pratt truss , and state if the members are in tension or compression

Determine the force in each member of the truss, and state if the members are in tension or compression. Hint: The horizontal force component at A must be zero. Why?

Determine the force in each member of the truss and state if the members are in tension or compression. Hint: The vertical component of force at C must equal zero. Why?

Each member of the truss is uniform and has a mass of 8 kg>m. Remove the external loads of 6 kN and 8 kN and determine the approximate force in each member due to the weight of the truss. State if the members are in tension or compression. Solve the problem by assuming the weight of each member can be represented as a vertical force, half of which is applied at each end of the member.

Determine the force in each member of the truss and state if the members are in tension or compression.

Determine the force in each member of the truss and state if the members are in tension or compression. Set P1 = 10 kN , P2 = 15 kN .

Determine the force in each member of the truss and state if the members are in tension or compression. Set P1 = 0 , P2 = 20 kN .

Determine the force in each member of the truss and state if the members are in tension or compression. Set P1 = 100 lb, P2 = 200 lb, P3 = 300 lb.

Determine the force in each member of the truss and state if the members are in tension or compression. Set P1 = 400 lb, P2 = 400 lb, P3 = 0.

Determine the force in each member of the truss. State whether the members are in tension or compression. Set P = 8 kN.

If the maximum force that any member can support is 8 kN in tension and 6 kN in compression, determine the maximum force P that can be supported at joint D

Determine the force in each member of the truss and state if the members are in tension or compression. Hint: The resultant force at the pin E acts along member ED . Why?

Each member of the truss is uniform and has a mass of 8 kg>m. Remove the external loads of 3 kN and 2 kN and determine the approximate force in each member due to the weight of the truss. State if the members are in tension or compression. Solve the problem by assuming the weight of each member can be represented as a vertical force, half of which is applied at each end of the member

Determine the force in each member of the truss in terms of the load P , and indicate whether the members are in tension or compression.

If the maximum force that any member can support is 4 kN in tension and 3 kN in compression, determine the maximum force P that can be supported at point B . Take d = 1 m

Determine the force in each member of the double scissors truss in terms of the load P and state if the members are in tension or compression.

Determine the force in each member of the truss in terms of the load P and state if the members are in tension or compression

Each member of the truss is uniform and has a weight W . Remove the external forces P and determine the approximate force in each member due to the weight of the truss. State if the members are in tension or compression. Solve the problem by assuming the weight of each member can be represented as a vertical force, half of which is applied at each end of the member.

Determine the force in each member of the truss in terms of the external loading and state if the members are in tension or compression.

The maximum allowable tensile force in the members of the truss is (Ft )max = 2 kN, and the maximum allowable compressive force is (Fc)max = 1.2 kN. Determine the maximum magnitude P of the two loads that can be applied to the truss. Take L = 2 m and u = 30.

Determine the force in members HG , HE , and DE of the truss, and state if the members are in tension or compression

Determine the force in members CD , HI , and CJ of the truss, and state if the members are in tension or compression.

Determine the force in members GB and GF of the bridge truss and state if these members are in tension or compression.

Determine the force in members EC , EF , and FC of the bridge truss and state if these members are in tension or compression.

Determine the force in members CD , CJ , KJ , and DJ of the truss which serves to support the deck of a bridge. State if these members are in tension or compression.

Determine the force in members EI and JI of the truss which serves to support the deck of a bridge. State if these members are in tension or compression.

Determine the force in member GJ of the truss and state if this member is in tension or compression.

Determine the force in member GC of the truss and state if this member is in tension or compression.

Determine the force in members BC, HC , and HG . After the truss is sectioned use a single equation of equilibrium for the calculation of each force. State if these members are in tension or compression.

Determine the force in members CD , CF , and CG and state if these members are in tension or compression.

Determine the force in members GF, FB , and BC of the Fink truss and state if the members are in tension or compression.

Determine the force in members FE and EC of the Fink truss and state if the members are in tension or compression.

Determine the force in members IC and CG of the truss and state if these members are in tension or compression. Also, indicate all zero-force members.

Determine the force in members JE and GF of the truss and state if these members are in tension or compression. Also, indicate all zero-force members.

Determine the force in members FG , GC and CB of the truss used to support the sign, and state if the members are in tension or compression.

Determine the force in members LK , LC , and BC of the truss, and state if the members are in tension or compression

Determine the force in members JI , JE , and DE of the truss, and state if the members are in tension or compression.

The skewed truss carries the load shown. Determine the force in members CB, BE , and EF and state if these members are in tension or compression. Assume that all joints are pinned.

The skewed truss carries the load shown. Determine the force in members AB, BF , and EF and state if these members are in tension or compression. Assume that all joints are pinned

Determine the force in members CD and CM of the Baltimore bridge truss and state if the members are in tension or compression. Also, indicate all zero-force members

Determine the force in members EF, EP , and LK of the Baltimore bridge truss and state if the members are in tension or compression. Also, indicate all zero-force members.

The truss supports the vertical load of 600 N. If L = 2 m , determine the force on members HG and HB of the truss and state if the members are in tension or compression.

The truss supports the vertical load of 600 N. Determine the force in members BC , BG , and HG as the dimension L varies. Plot the results of F (ordinate with tension as positive) versus L (abscissa) for 0 L 3 m .

Determine the force developed in each member of the space truss and state if the members are in tension or compression. The crate has a weight of 150 lb.

Determine the force in each member of the space truss and state if the members are in tension or compression. Hint: The support reaction at E acts along member EB . Why?

Determine the force in each member of the space truss and state if the members are in tension or compression. The truss is supported by rollers at A, B , and C .

The space truss supports a force F = [300i + 400j - 500k] N. Determine the force in each member, and state if the members are in tension or compression.

The space truss supports a force F = [-400i + 500j + 600k] N. Determine the force in each member, and state if the members are in tension or compression.

Determine the force in each member of the space truss and state if the members are in tension or compression. The truss is supported by ball-and-socket joints at C, D, E , and G .

The space truss is used to support vertical forces at joints B, C , and D . Determine the force in each member and state if the members are in tension or compression. There is a roller at E, and A and F are ball-and-socket joints.

Determine the force in members BE , BC , BF , and CE of the space truss, and state if the members are in tension or compression.

Determine the force in members AF, AB, AD, ED, FD , and BD of the space truss, and state if the members are in tension or compression. x y z

The space truss is supported by a ball-and-socket joint at D and short links at C and E . Determine the force in each member and state if the members are in tension or compression. Take F1 = {-500k} lb and F2 = {400j} lb

The space truss is supported by a ball-and-socket joint at D and short links at C and E . Determine the force in each member and state if the members are in tension or compression. Take F1 = {200i + 300j - 500k} lb and F2 = {400j} lb.

In each case, determine the force P required to maintain equilibrium. The block weighs 100 lb.

Determine the force P on the cord, and the angle u that the pulley-supporting link AB makes with the vertical. Neglect the mass of the pulleys and the link. The block has a weight of 200 lb and the cord is attached to the pin at B . The pulleys have radii of r1 = 2 in. and r2 = 1 in.

The principles of a differential chain block are indicated schematically in the figure. Determine the magnitude of force P needed to support the 800-N force. Also, find the distance x where the cable must be attached to bar AB so the bar remains horizontal. All pulleys have a radius of 60 mm.

Determine the force P needed to support the 20-kg mass using the Spanish Burton rig . Also, what are the reactions at the supporting hooks A , B , and C

Determine the horizontal and vertical components of force at C which member ABC exerts on member CEF.

Determine the horizontal and vertical components of force that the pins at A, B , and C exert on their connecting members.

Determine the horizontal and vertical components of force at pins D and E, and the force on the short link at A. The suspended cylinder has a weight of 80 lb.

Determine the greatest force P that can be applied to the frame if the largest force resultant acting at A can have a magnitude of 2 kN.

Determine the force that the smooth roller C exerts on member AB . Also, what are the horizontal and vertical components of reaction at pin A ? Neglect the weight of the frame and roller.

Determine the horizontal and vertical components of force at pins B and C .

Determine the support reactions at A, C , and E on the compound beam which is pin connected at B and D .

Determine the horizontal and vertical components of force at pins A , B , and C , and the reactions at the fixed support D of the three-member frame.

The compound beam is fixed at A and supported by a rocker at B and C . There are hinges (pins) at D and E . Determine the reactions at the supports

The wall crane supports a load of 700 lb. Determine the horizontal and vertical components of reaction at the pins A and D. Also, what is the force in the cable at the winch W

The wall crane supports a load of 700 lb. Determine the horizontal and vertical components of reaction at the pins A and D. Also, what is the force in the cable at the winch W? The jib ABC has a weight of 100 lb and member BD has a weight of 40 lb. Each member is uniform and has a center of gravity at its center.

Determine the horizontal and vertical components of force which the pins at A, B , and C exert on member ABC of the frame.

Determine the required mass of the suspended cylinder if the tension in the chain wrapped around the freely turning gear is to be 2 kN. Also, what is the magnitude of the resultant force on pin A ?

Determine the reactions on the collar at A and the pin at C . The collar fits over a smooth rod, and rod AB is fixed connected to the collar

The toggle clamp is subjected to a force F at the handle. Determine the vertical clamping force acting at E .

When a force of 2 lb is applied to the handles of the brad squeezer, it pulls in the smooth rod AB . Determine the force P exerted on each of the smooth brads at C and D .

The engine hoist is used to support the 200-kg engine. Determine the force acting in the hydraulic cylinder AB , the horizontal and vertical components of force at the pin C , and the reactions at the fixed support D .

The three power lines exert the forces shown on the pin-connected members at joints B, C, and D, which in turn are pin connected to the poles AH and EG . Determine the force in the guy cable AI and the pin reaction at the support H .

By squeezing on the hand brake of the bicycle, the rider subjects the brake cable to a tension of 50 lb. If the caliper mechanism is pin connected to the bicycle frame at B , determine the normal force each brake pad exerts on the rim of the wheel. Is this the force that stops the wheel from turning? Explain

Determine the required force P that must be applied at the blade of the pruning shears so that the blade exerts a normal force of 20 lb on the twig at E

The pruner multiplies blade-cutting power with the compound leverage mechanism. If a 20-N force is applied to the handles, determine the cutting force generated at A . Assume that the contact surface at A is smooth.

The pipe cutter is clamped around the pipe P . If the wheel at A exerts a normal force of FA = 80 N on the pipe, determine the normal forces of wheels B and C on the pipe. Also compute the pin reaction on the wheel at C . The three wheels each have a radius of 7 mm and the pipe has an outer radius of 10 mm.

The flat-bed trailer has a weight of 7000 lb and center of gravity at GT. It is pin connected to the cab at D . The cab has a weight of 6000 lb and center of gravity at GC. Determine the range of values x for the position of the 2000-lb load L so that no axle is subjected to more than 5500 lb. The load has a center of gravity at GL

Show that the weight W1 of the counterweight at H required for equilibrium is W1 = (b>a)W , and so it is independent of the placement of the load W on the platform

The derrick is pin connected to the pivot at A . Determine the largest mass that can be supported by the derrick if the maximum force that can be sustained by the pin at A is 18 kN.

Determine the force that the jaws J of the metal cutters exert on the smooth cable C if 100-N forces are applied to the handles. The jaws are pinned at E and A , and D and B . There is also a pin at F .

he pumping unit is used to recover oil. When the walking beam ABC is horizontal, the force acting in the wireline at the well head is 250 lb. Determine the torque M which must be exerted by the motor in order to overcome this load. The horse-head C weighs 60 lb and has a center of gravity at GC. The walking beam ABC has a weight of 130 lb and a center of gravity at GB , and the counterweight has a weight of 200 lb and a center of gravity at GW. The pitman, AD , is pin connected at its ends and has negligible weight.

The scissors lift consists of two sets of cross members and two hydraulic cylinders, DE , symmetrically located on each side of the platform. The platform has a uniform mass of 60 kg, with a center of gravity at G1. The load of 85 kg, with center of gravity at G2, is centrally located between each side of the platform. Determine the force in each of the hydraulic cylinders for equilibrium. Rollers are located at B and D.

The two disks each have a mass of 20 kg and are attached at their centers by an elastic cord that has a stiffness of k = 2 kN>m . Determine the stretch of the cord when the system is in equilibrium and the angle u of the cord.

A man having a weight of 175 lb attempts to hold himself using one of the two methods shown. Determine the total force he must exert on bar AB in each case and the normal reaction he exerts on the platform at C. Neglect the weight of the platform

A man having a weight of 175 lb attempts to hold himself using one of the two methods shown. Determine the total force he must exert on bar AB in each case and the normal reaction he exerts on the platform at C.The platform has a weight of 30 lb.

The double link grip is used to lift the beam. If the beam weighs 4 kN, determine the horizontal and vertical components of force acting on the pin at A and the horizontal and vertical components of force that the flange of the beam exerts on the jaw at B .

If a force of P = 6 lb is applied perpendicular to the handle of the mechanism, determine the magnitude of force F for equilibrium. The members are pin connected at A, B, C , and D .

Determine the horizontal and vertical components of force at pin B and the normal force the pin at C exerts on the smooth slot. Also, determine the moment and horizontal and vertical reactions of force at A . There is a pulley at E .

If a clamping force of 300 N is required at A , determine the amount of force F that must be applied to the handle of the toggle clamp

If a force of F = 350 N is applied to the handle of the toggle clamp, determine the resulting clamping force at A

If a force of 10 lb is applied to the grip of the clamp, determine the compressive force F that the wood block exerts on the clamp.

The tractor boom supports the uniform mass of 500 kg in the bucket which has a center of mass at G . Determine the force in each hydraulic cylinder AB and CD and the resultant force at pins E and F . The load is supported equally on each side of the tractor by a similar mechanism.

The two-member frame supports the 200-lb cylinder and 500@lb # ft couple moment. Determine the force of the roller at B on member AC and the horizontal and vertical components of force which the pin at C exerts on member CB and the pin at A exerts on member AC . The roller C does not contact member CB .

The mechanism is used to hide kitchen appliances under a cabinet by allowing the shelf to rotate downward. If the mixer weighs 10 lb, is centered on the shelf, and has a mass center at G , determine the stretch in the spring necessary to hold the shelf in the equilibrium position shown. There is a similar mechanism on each side of the shelf, so that each mechanism supports 5 lb of the load. The springs each have a stiffness of k = 4 lb>in.

The linkage for a hydraulic jack is shown. If the load on the jack is 2000 lb, determine the pressure acting on the fluid when the jack is in the position shown. All lettered points are pins. The piston at H has a cross-sectional area of A = 2 in2 . Hint: First find the force F acting along link EH . The pressure in the fluid is p = F>A.

If d = 0.75 ft and the spring has an unstretched length of 1 ft, determine the force F required for equilibrium

f a force of F = 50 lb is applied to the pads at A and C , determine the smallest dimension d required for equilibrium if the spring has an unstretched length of 1 ft

The hydraulic crane is used to lift the 1400-lb load. Determine the force in the hydraulic cylinder AB and the force in links AC and AD when the load is held in the position shown

The symmetric coil tong supports the coil which has a mass of 800 kg and center of mass at G . Determine the horizontal and vertical components of force the linkage exerts on plate DEIJH at points D and E . The coil exerts only vertical reactions at K and L .

If each of the three uniform links of the mechanism has a length L = 3 ft and weight of W = 10 lb , determine the angle u for equilibrium. The spring has a stiffness of k = 20 lb>in. It always remains vertical due to the roller guide and is unstretched when u = 0 .

If each of the three uniform links of the mechanism has a length L and weight W , determine the angle u for equilibrium. The spring, which always remains vertical, is unstretched when u = 0.

The piston C moves vertically between the two smooth walls. If the spring has a stiffness of k = 15 lb>in., and is unstretched when u = 0, determine the couple M that must be applied to AB to hold the mechanism in equilibrium when u = 30.

The aircraft-hangar door opens and closes slowly by means of a motor, which draws in the cable AB . If the door is made in two sections (bifold) and each section has a uniform weight of 300 lb and height L = 10 ft , determine the force on the cable when u = 90 . The sections are pin connected at C and D and the bottom is attached to a roller that travels along the vertical track.

The aircraft-hangar door opens and closes slowly by means of a motor which draws in the cable AB . If the door is made in two sections (bifold) and each section has a uniform weight W and height L , determine the force in the cable as a function of the door's position u. The sections are pin connected at C and D and the bottom is attached to a roller that travels along the vertical track.

The three pin-connected members shown in the top view support a downward force of 60 lb at G . If only vertical forces are supported at the connections B, C, E and pad supports A, D, F , determine the reactions at each pad.

The structure is subjected to the loading shown. Member AD is supported by a cable AB and roller at C and fits through a smooth circular hole at D . Member ED is supported by a roller at D and a pole that fits in a smooth snug circular hole at E . Determine the x, y, z components of reaction at E and the tension in cable AB .

The three-member frame is connected at its ends using ball-and-socket joints. Determine the x, y, z components of reaction at B and the tension in member ED . The force acting at D is F = {135i + 200j - 180k} lb.

The structure is subjected to the force of 450 lb which lies in a plane parallel to the yz plane. Member AB is supported by a ball-and-socket joint at A and fits through a snug hole at B . Member CD is supported by a pin at C . Determine the x, y, z components of reaction at A and C