Qn4

a) Difine the following terms as applied to mechanical properties of a material

     i) stenght

     ii) Brittleness

    iii) Ductility 

b) State any three characteristics of a concrete that makes it desirable 

     for building materials 

c)

     i) State hooke’s law

    ii) Describe an experiment to verify hooke’s law (Include diagram)

d) A force of 50N causes an extension of 5mm on stretching material. 

      What will the extension be when a force of  150N is applied