ICE#06- Chapter 5

If a support prevents translation of a body, then the support exerts a _______ on the body.

• Couple moment

• Force

• Both force and couple moment

• None of the above

Internal forces are _________ shown on the free body diagram of a whole body.

• Always

• Often

• Rarely

• Never

The beam and the cable (with a frictionless pulley at D) support an 80 kilogram load at C. In a FBD of only the beam, there are how many unknowns?

• Two forces and one couple moment

• Three forces and one couple moment

• Three forces

• Four forces

If the directions of the force and the couple moments are both reversed, what will happen to the beam?

• The beam will lift from A.

• The beam will lift at B.

• The beam will be restrained.

• The beam will break

Internal forces are not shown on a free-body diagram because the internal forces are_______. (Choose the most appropriate answer.)

• Equal to zero

• Equal and opposite and they do not affect the calculations

• Negligibly small

• Not important

How many unknown support reactions are there in this problem?

• Two forces and two couple moments

• One force and two couple moments

• Three forces

• Three forces and one couple moment