(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.

A man of mass M = 75 kg moved a TV of mass 20 kg from the ground floor to the third floor at a height of about 10 m. What is the work done by this man?

(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.