REINFORCEMENT ACTIVITIES
Conditions of structures (I)
Technology II ESO
PHOTOCOPIABLE MATERIAL /
© Oxford University Press España, S. A.
1
. What three conditions must a structure fulfil? Define each of them in your own words.
Stress
Definition
2.
Where is the centre of gravity in the following figures:
□
Which is the most stable?
3.
Add any rods needed to make these structures more rigid:
a)
b)
c)
4.
Apply the forces shown in the drawings to a toothpick:
a)
Identify the stresses the toothpicks are
subjected to.
A
C
D
b)
Which method represents the easiest
way to break it?
c)
Which method represents the most
difficult way to break it?
B
d)
Why does it break sooner with the first
method than in the second?
