78901. The purpose of a filter drier is to remove:
78902. Determine the moment of force F1 about point A on the beam.
78903. The storage capacity of a dissolved acetylene cylinder is:
78904. Replace the force at A by an equivalent force and couple moment at P.
78905. The heart of refrigeration system is:
78906. If F1 = F2 = 30lb, determine the angles and so that the resultant force is directed along the positive x axis and has a magnitude of FR = 20 lb.
78907. Express the Force F2 in Cartesian vector form.
78908. The antenna tower is supported by three cables. The forces in these cables are as follows: FB = 520 N, FC = 680 N, and FD = 560 N. Write the resultant of these three forces as a vector.
78909. The cable AO exerts a force on the top of the pole of F = {—120i — 90j — 80k} lb. If the cable has a length of 34 ft, determine the height z of the pole and the location (x,y) of its base.
78910. The ball joint is subjected to the three forces shown. Find the magnitude of the resultant force.
78911. Express the force F1 in Cartesian vector form.
78912. Determine the projection of the position vector r along the aa axis.
78913. What is the projection of the force F2 along the positive axis?
78914. Determine the magnitude and direction of the position vector r which points from point A to point B.
78915. Determine the magnitude of the x and y components of the 700-lb force.
78916. Determine the magnitude and direction of the resultant force.
78917. The gusset plate G of a bridge joint is subjected to the two member forces at A and B. If the force at B is horizontal and the force at A is directed at = 30°, determine the magnitude and direction of the resultant force.
78918. If = 20° and = 35°, determine the magnitudes of F1 and F2 so that the resultant force has a magnitude of 20 lb and is directed along the positive x axis.
78919. Determine the angle between the pole AC and the wire AB.
78920. Two forces act on a block. Determine the angle between them.
78921. Determine the magnitude of the x and y components of the 2—kN force.
78922. Cable BC exerts a force of F = 28 N on the top of the flagpole. Determine the projection of this force along the positive z axis of the pole.
78923. Determine the magnitudes of the resultant force and its direction measured from the positive x axis.
78924. Determine the design angle ( <90°) bretween the two struts so that the 500-lb horizontal force has a component of 600lb directed from A toward C. That is the component of force acting along member AB?
78925. Determine the magnitude and direction of F so that this force has components of 40 lb acting from A toward B and 60lb acting from A toward C on the frame.
78926. Express each force in Cartesian vector form.
78927. Determine the magnitude and direction angles of F2, so that the resultant of the two forces acts upward along the z axis of the pole and has a magnitude of 275 N.
78928. Determine the design angle for connecting member A to the plate if the resultant force is to be directed vercially upward. Also, what is the magnitude of the resultant?
78929. The cord is attached between two walls. If it is 8 m long, determine the distance x to the point of attachment at B.
78930. Determine the magnitude of the resultant force by adding the rectangular components of the three forces.
78931. Express force F as a Cartesian vector; then determine its direction angles.
78932. Velocity is measured in the units of:
78933. Force F acts on peg A such that one of its components, lying in the x-y plane, has a magnitude of 50 lb. Express F as a Cartesian vector.
78934. The boy at D has a mass of 50 kg, a center of mass at G, and stands on a plank at the position shown. The plank is pin-supported at A and rests on a post at B. Neglecting the weight of the plank and post, determine the magnitude of force P his friend (?) at E must exert in order to pull out the post. Take B = 0.3 and C = 0.8.
78935. A uniform beam has a mass of 18 kg and rests on two surfaces at points A and B. Determine the maximum distance x to which the girl can slowly walk up the beam before it begins to slip. The girl has a mass of 50 kg and walks up the beam with a constant velocity.
78936. Determine the minimum force F needed to push the two 75-kg cylinders up the incline. The force acts parallel to the plane and the coefficients of friction at the contacting surfaces are A = 0.3, B = 0.25, C = 0.4. Each cylinder has a radius of 150 mm.
78937. The refrigerator has a weight of 200 lb and a center of gravity at G. Determine the force P required to move it. Will the refrigerator tip or slip? Take = 0.4.
78938. A 17-kg ladder has a center of mass at G. If the coefficients of friction at A and B are A = 0.3 and B = 0.2, respectively, determine the smallest horizontal force that the man must exert of the ladder at point C in order to push the ladder forward.
78939. Determine the angles and and the length of side AB of the triangle. Note that there are two possible answers to this question and we have provided only one of them as an answer.
78940. Determine the length of side AB if right angle ABC is similar to right angle A'B'C':
78941. Determine the angle :
78942. Solve the following equation for the two roots of x: — x2 + 5x = — 6
78943. Using the basic trigonomic functions, determine the length of side AB of the right triangle.
78944. Solve the following equation for the two roots of x: x2 — 16 = 0
78945. Colour code of ammonia refrigerant cylinder:
78946. Identify the zeotropic refrigerant from the following:
78947. Solve the following equation for x, y, and z:x – y + z = –1–x + y + z = –1x + 2y – 2z = 5
78948. Double cut file is made of:
78949. Determine the internal axial force, shear force, and moment at point F of the frame.
78950. The work platform supports an 80-kg man having a mass center at G. Determine the axial force, shear force, and bending moment at point E of the telescopic column AB due to the load of the man only.
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