Mech 210 midterm 2

Question 1

truss

Answer 1

• Truss: a structure composed of slender members joined together at their end points usually by pins. Tension or compression

Question 2

zero force member

Answer 2

structural members that support No loading but aid in the stability of the truss.

Question 3

Frame

Answer 3

an assembly of rigid members (of which at least one is a multi – force member) intended to be a stationary structure for supporting a load.

Question 4

machine

Answer 4

o contain moving parts and are designed to transmit and alter the effect of forces (structure / configuration change)
o At least one multi force member
o secondary objects can be seen to make it static

Question 5

Beam

Answer 5

Beams: structural members designed to support loadings applied perpendicular to their axes

Question 6

Difference between truss frame machine beam

Answer 6

Truss only 2 force members
Frame is stationary
Machine contains moving parts that alter effect of force
Beam is just one member

Question 7

Shear force

Answer 7

Internal force acting parallel to member which resists the relative translation between the segments on both sides of the shear force

Question 8

Centroid

Answer 8

Geometric center of the area under a distributed loading curve. Point where resultant force of distributed loading acts

Question 9

Bending moment

Answer 9

Internal moment in a member which resists the bending of the member (relative rotation of a cross-section of a member)