The diagram below shows a light bar PR pivoted at P,balanced by a 4N weight and force F. Q Newton balance 40 20 20cm voilol S A Weight 4N What is the reading on the Newton balance? a

A carpenter holds a 15-lb 2-in. by 4-in. board as shown. If he exerts vertical forces on the board, determine the forces at A and B (use positive if the force is up and negative if down). A Answers: NA Ng i 2 B 10 lb

The figure shows an engine block with a mass of 250 kg suspended by ropes connected to a central ring at A. What is the tension (force) in the AB rope?

SAQ 1 1.2 m D C An 80-kn'm couple shown in the plate is caused by a pair of parallel forces of magnitude F (not shown). Determine: 80 kN m a) the smallest possible value of F, and 1.6 m b) the value of F if the forces act at points A and C and are parallel to the dashed line shown at A. A В 60°

A load W = 36 kN is to be lifted a mast as shown. The mast BC weighs 8 kN. a. What is the tensile force in cable AB? b. What is the vertical reaction at C? c. What is the total reaction at C?

The uniform rod in figure shown weighs 420 kN and has its center of gravity at G. Determine the tension in the cable and the reactions at A and B. 420 TRA Cable r N

TUDieis .(H. W) Fy: fsin 30 Fx=f cos?0 977184224 .1- Four forçes act on bolt A as shown. Determine the resultant of the force on Le bolt. F150 N FR OLUTION: PY=100 N Resolve each force into rectangular components. Determine the components of the resultant by adding the corresponding x =e force components. Calculate the magnitude and direction of the resultant. 1- G- tanl fy соmp y-comp

A 422 N was applied to a 273 kg block, find the normal force if the angle 0 = 66.1 degrees. F Select one: Oa 2849.0997 N Ob. 2507.1603 N Oc. 2292.3148 N Od 2678.1300 N

23. The diagram below shows a door viewed from above. Much to their parent's annoyance, two kids are fighting over opening/closing the door - do not do this at home! (Note that the door does not have a latch exerting any force on it) The diagram below shows the force that child A is exerting on the door: of magnitude F in the south direction, a distance of L/3 from the hinge. N wefe W E S F hinge L/3 L Child B decides to exert a force on the edge of the door, as far as possible from the hinge. What is the magnitude and direction of the force that child B must exert if the door does not move? A) Force of magnitude F in the north direction B) Force of magnitude F in the east direction C) Force of magnitude F/3 in the north direction D) Force of magnitude F/3 in the west direction

The leg and cast in the figure weigh 220 N (w;). Determine the weight wz and the angle alpha needed so that no force is exerted on the hip joint by the leg plus the cast. 110 N