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# ENGR104 Statics Midterm Exam 1 Units 1 thru 5 instructor 100 total points Instructions: Close Book. Closed Notes. Enter result in the space provided...

this is question #6 in the attach Assignment with some corrections:
6) Consider the Warren truss shown. The uniformly distributed load w = 6.25 kN/m is suspended from joints E and G using links or cables. Use the method of sections to determine the load in member BC.

NHI:

Is force Tensile or Compressive?

Thank you

ENGR104 Statics instructor Midterm Exam 1 Units 1 thru 5 100 total points Instructions: Close Book. Closed Notes. Enter result in the space provided on this sheet with proper units. Read problem carefully. Attach all work. Problem 1 (15 points) Determine the Cartesian components of a force vector with the following characteristics: Magnitude: 3 N Point of Application: coordinate location (1, -2, 3) m Sense and Direction: Force “points” to coordinate location (-1, 2, -3) m F = -0.802 i + 1.604 j + -2.405 k Problem 2 (10 points) A force, F = 1 i + 2 j + 3 k lbs, is applied at the origin. Determine the moment of the force about the point at coordinate location (3, 2, 1) inches. M = -4 i +8 j +-4 k Problem 3 (15 points) Find angle ABC if the coordinates are A = (2, 3, -4), B = (1, 1, 1) and C = (4, -3, -2) m . angle = 71.75 Page 1 of 2
Problem 4 (20 points) The 2D shape is composed of a semi-circle with radius r , a rectangle and a triangle as shown. If r = 110 mm determine the coordinates of the center of gravity of the rigid assembly. Assume uniform thickness and density. X = -51.45 Y = -64.96 Problem 5 (20 points) The dam gate is hinged at A and held at the angle shown by a single horizontal cable located at the surface of the water. Determine the depth of water if the tension in the cable is 33 kN. Assume the ‘width’ of the gate b= 1 m and ignore the mass of the gate. Depth = 3.59 Problem 6 (20 points) Consider the Warren truss shown. The uniformly distributed load w = 1.5 kN/m is suspended from joints E and G using links or cables. Use the method of sections to determine the load in member BC. N BC : Is force Tensile or Compressive? instructor Page 2 of 2

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