135
5
Structures
EXAM B
Traction
: rubber band of a catapult
Compression
:
table leg
Bending
: book shelf
Cutting
:
scissors cutting paper
9.
Indicate which loads the following bodies are subjected
to, and say which part of them forms the structure: a
plastic cup, a construction crane and a table.
Object Structure
Loads
Plastic
cup
The whole of
the cup
The pressure of the liquid inside it
and the force of the hand that is
holding it
Crane
Triangular
structure
The weight of the crane that rises
above the counterweight and the
weight of the structure itself;
the force of the wind on the crane
Table
The legs of
the table
Its own weight, the weight of the
people it is supporting and the
weight of the things placed upon it
10.
Design a structure of paper rods which could hold 2
kg of weight at the centre when placed between two
tables 40 cm apart. Draw it at a scale of 1: 5.
40 cm
45 cm
10 cm
