Materials Worksheet
1. In the table below, write the type of constraint described and draw its symbol.
Description
Constraint
Symbol
1. Sandra and Melanie are going to twist the towel
that fell in the water to wring the water out of it.
2. Rachel is stretching the plastic wrap over the bowl
of macaroni she has made.
3. The weight of the snow has bent the metal fence
at the bottom of the yard.
4. Aviation snips can be used to cut sheet metal.
5. A hammer blow has left a mark on the wooden
worktable in the technology workshop.
6. Gerald is finding it difficult to drive a screw
through a knot in a wooden plank.
2. Which type of deformation do the following statements describe?
a) The hood of a car was bent in a collision.
b) A flagpole was broken during a windstorm.
c) David screwed a decorative switch plate onto the wall too hard, and the switch plate
cracked.
3. Match each of the examples below with a mechanical property (A–E).
A. hardness B. elasticity C. resilience D. stiffness E. resistance to corrosion
a) The fibres in a trampoline bounce mat must be able to recover their original shape
rapidly.
b) It is very difficult to hammer a nail through a knot in a piece of wood.
c) Chrome on the hubcaps of a car enhances its look and prevents rust at the same
time.
d) Marble is an expensive floor covering, but it is very difficult to deform.
4. Do the following statements describe the degradation or the protection of a
material?
a) A wooden patio is treated with an anti-fungal coating.
b) The plastic pot that was left out all winter has cracks all over its surface.
