MOCK TEST-1_STATICS

A 2-D force system with geometry as shown. Let’s determine the equivalent resultant force and couple moment acting at A

• 184kN,

  +509.7 lb⋅ft

• 201kN,

  +406.7 lb⋅ft

• 80kN,

  +345.7 lb⋅ft

• 311kN,

  +210.7 lb⋅ft

A 2-D force system with geometry as shown. Let’s determine the equivalent single force location measured from A.

• 4.12 m

• 3.12 m

• 5.12 m

• 2.12 m

The homogeneous 60-kg disk supported by the rope AB rests against a rough vertical wall. 

2. 1. The force (N) in the rope is most nearly:

3. 2. The reaction (N) at the wall is most nearly: 

• 1. 1. 735.8 N

  2. 2. 441 N

• 1. 1. 565.8 N

  2. 2. 551 N

• 1. 1. 385.8 N

  2. 2. 331 N

• 1. 1. 434.8 N

  2. 2. 221 N

The homogeneous, 120−kg wooden beam is suspended from ropes at A and B. A moment of 500−N⋅m clockwise is applied at C. The tension (N) in both cables is most nearly:

• TB = 1785.9 N
  TA = 452.3 N

• TB = 1007.9 N
  TA = 169.3 N

• TB = 1300.9 N
  TA = 245.3 N

• TB = 564.9 N
  TA = 754.3 N

The homogeneous 300−kg cylinder is pulled over the 100−mm step by the horizontal force P. Assume sufficient friction at corner B to prevent slipping. The smallest force P that would raise the cylinder off the surface at A is most nearly: 

• 940.34 N

• 563.34 N

• 628.34 N

• 887.34 N

What are two common cases to look for when trying to identify zero forces members:

• If two members form a truss joint and there is NO external load or support reaction at that joint, then those members are zero-force members.

• If two members form a truss joint and there is NO external load or support reaction at that joint and the two members are collinear then they are said to zero-force members.

• If three members form a truss joint and there is NO external load or support reaction at that joint, then those members are zero-force members.

• If three members form a truss joint and there is NO external load or support reaction at that joint and two of those members are collinear then the third member is a zero-force member.

Let’s identify all the zero-force members for the following structure:

• AF, AB, BC, CE

• ED, CD, EF, BE

• AF, AB, ED, CD

• EF, BE, AF, AB

Identify all the zero-force members for the following structure:

• BL, BK, EJ, DJ, JK, JI

• BL, BK, EJ, EI, FI, FH

• EI, FI, FH, DJ, JK, JI

• DJ, JK, JI, AB, AL, BL

For the shape shown, determine the moment of inertia about the centroidal axis xc−xc 

• 9.08×10^7 mm4

• 8.91×10^7 mm4

• 10.10×10^7 mm4

• 9.50×10^7 mm4

The 50-kg block shown is at rest on the plane. The friction force (N) when the applied P becomes 150 N is most nearly: 

• 75 N

• 300 N

• 150 N

• 0 N