Week 1
Forces defined by direction, sense and magnitude
Knowledge Map ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !
• Tension o external load pulls on a structural member! o particles move apart and undergo tension! o stretch and elongate the material! • Compression! o opposite effect of a tension force! o external load pushes on a structural member! o particles of the material compact together! o result in the shortening of the material!
Materials • Melbourne – bluestone (basalt) Victoria volcanoes Dark colouring • Sydney - sandstone • Perth - clay for brick, limestone