Tham khảo tài liệu 'physics_test_bank_split_13', khoa học tự nhiên, vật lý phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Simpo PDF Merge and Split Unregistered Version - http 20. A uniform rod AB is m long and weighs 16 N. It is suspended by strings AC and BD as shown. A block P weighing 96 N is attached at E m from A. The magnitude of the tension force of the string BD is A. B. 24N C. 32 N D. 48N E. 80N ans C 21. A weightless strut hinged to a wall is used to support an 800-N block as shown. The horizontal and vertical components of the force of the hinge on the strut are hinge A. Fh 800N Fy 800N B. fH 600N fY 800N C. Fh 800N fY 600N D. fH 1200N FY 800N E. fH 0 FY 800N ans B 22. A uniform plank is m long and weighs 80 N. It is balanced on a sawhorse at its center. An additional 160 N weight is now placed on the left end of the plank. To keep the plank balanced it must be moved what distance to the left A. m B. C. m D. E. m ans B Chapter 12 EQUILIBRIUM AND ELASTICITY 181 Simpo PDF Merge and Split Unregistered Version - http 23. A uniform 240-g meter stick can be balanced by a 240-g weight placed at the 100-cm mark if the fulcrum is placed at the point marked A. 75 cm B. 60 cm C. 50 cm D. 40 cm E. 80 cm ans A 24. A ladder leans against a wall. If the ladder is not to slip which one of the following must be true A. The coefficient of friction between the ladder and the wall must not be zero B. The coefficient of friction between the ladder and the floor must not be zero C. Both A and B D. Either A or B E. Neither A nor B ans B 25. An 80-N uniform plank leans against a frictionless wall as shown. The magnitude of the torque about point P applied to the plank by the wall is A. 40N m B. 60N m C. 120 N m D. 160 N m E. 240 N m ans C 182 Chapter 12 EQUILIBRIUM AND ELASTICITY Simpo PDF Merge and Split Unregistered Version - http 26. An 800-N man stands halfway up a long ladder of negligible weight. The base of the ladder is m from the wall as shown. Assuming that the wall-ladder contact
