(3) Determine the forces in members BD and CD of the loaded truss. Ans: BD 51 kN C, CD = 48 kN T A 4.5 m B с 3.2 m 24 kN 6 m 6 m E

ton 8M0T0ARR ni 1owens uoy evio 6. A square plate 3 ft on each side is submerged with the top side parallel to the surface, 5 ft below the water. Find the force against the plate.(pg=62.4 lb/ft')

Two particles have a mass of 7 kg and 15 kg, respectively. Part A If they are 800 mm apart, determine the force of gravity acting between them. Express your answer to three significant figures and include the appropriate units.

(5) Determine the force in members AD and BD of the loaded truss. Ans: AD=4170 T, BD = 3590 N C 5m D 6m A 45° B 6m 5m 5000 N

A man pushes a lawnmower with a constant horizontal force of 45 N and moves a distance of 8.6 m in the direction he pushes. How much mechanical work has the man done on the lawnmower?

(5) The compound pliers consist of four members: two handles and two jaws pin- connected symmetrically as shown. For the applied forces P = 100 lb, determine the normal gripping force on the jaw at Q. Ans: 62.9 lb B D -3.5"- 1" 2.5"- 5.5"

(6) A force of 200 N is applied perpendicular to the wrench at its tip as shown. Determine the equivalent force-couple system at center O of the wheel. Ans: F=68.4-187.9 N, Mo = 78.3 N'm CW 650 mm 125 mm 450 mm 20° 200 N

A rod AB, hinged at A and at- tached at B to cable BD, supports the loads shown. Knowing that d = 200 mm, determine (a) the tension in cable BD, (b) the re- action at A. A 90 N D 90 N -100 mm-100 mm-1 mm-100 mm 100 mm

A weight of mass 100 kg hangs from two wires that make angles of 54° and 48°, respectively, below the horizontal, as shown in the diagram. 100kg T2 T₂ = T2 Find the tensions (forces) in both wires: T₁ Round your answer to 2 decimal places. i+ Round your answer to 2 decimal places. j. Round your answer to 2 decimal places. i+ Round your answer to 2 decimal places. j.

(6) The 180 lb uniform rectangular plate is suspended by three vertical cables as shown so that the plate remains in the horizontal position. Compute the tension in each cable. Ans: T₁ =70 lb, TB = 20 lb, Tc = 90 lb 15 in. 45 in. B 15 in. 50 in. 45 in.