PLTW POE Unit 2 Review

A vector has both ____ and _____

• speed and length
• magnitude and direction
• degrees and radians
• style and grace

The _______ of two or more vectors is the sum of the vectors.

• components
• scalar
• resultant
• magnitude

When a member is being pushed together or crushed, this is known as a ______ force

• tension

• shear

• torsion

• compression

____________ occurs when a force is pulling a member apart.

• compression

• torsion

• shear

• tension

If a truss has the proper combination of joints and members, it is said to be

• statically determinate

• unstable

• statically indeterminate

Consider the following forces, what additional force is needed to keep the block in static equilibrium?

• 9N force pointing up

• 9N force pointing down

• 16N force pointing down

• 16N force pointing up

If a structure is statically determinate it

• is mathematically solvable

• cannot be disfigured

• can handle large forces

• will break easily

Supplies one reaction force, perpendicular to a surface in a truss

• Node

• Member

• Roller

• Pin

The 500 lb force causes a ____ moment about point A.

• positive

• negative

• maximum

• neutral

If this truss is stable, the sum of the forces in the vertical direction

• equals 500 lb.

• equals 250 lb.

• equals 0.

• is unknown at this time.