Assignment Qp (sept2018).docx

ECV3113 (STATICS & DYNAMICS) September 2018 ASSIGNMENT Question 1 Two structural members A and B are bolted to a bracket as shown in Figure Q.1. Knowing that both members are in compression and that the force is 25 kN in member A and 15 kN in member B, determine by trigonometry the magnitude and direction of the resultant of the forces applied to the bracket by members A and B. (10 marks)

Figure Q.1 Question 2 Determine the reactions at A and B as shown in Figure Q.2 when (a) h = 0, (b) h = 200 mm. (10 marks)

Figure Q.2

Question 3 Determine the force in each member of the truss shown in Figure Q.3 and using the method of joints. State whether each member is in tension or compression. (10 marks)

Figure Q.3 Question 4 A projectile is fired from the edge of a 250-m cliff with an initial velocity of 150 m/s at an angle of 30o with the horizontal as shown in Figure Q.4. Neglecting air resistance, determine (a) the horizontal distance from the gun to the point where the projectile strikes the ground, (b) the greatest elevation above the ground reached by the projectile. (10 marks) 150 m/s

250 m

Figure Q.4 ALL THE BEST !