Structures & Forces: Unit Review

What kind of structure is this sand castle?

• Shell

• Frame

• Solid

The centre of gravity of an object is...

• the middle of an object

• the point where mass is balanced

• the bottom of the object

What shape is usually part of a truss?

• arch

• rectangle

• parallelogram

• triangle

Which of the following is NOT a shell structure?

• bike helmet

• egg

• tent

• snail shell

What kind of structure is this flower vase?

• Shell

• Frame

• Solid

The force on a bridge because of its own weight is called the...?

• tension

• live load

• dead load

• compression

A force that stretches or strains is...?

• torsion

• tension

• compression

• shear

You show the direction of a force with...?

• the length of an arrow

• where an arrow is pointing

• the letter F

What kind of structure is this tennis net?

• Shell

• Frame

• Solid

Shear is an...?

• internal force

• external force