materials 0.0 / 5 ? PhysicsMaterialsASAQA Created by: ParislouiseCreated on: 14-06-17 10:43 density = M (mass) x V (volume of material) 1 of 28 hookes law states that extension is proportional to force 2 of 28 hookes law equation F= K x changeL K=spring constaant L=extention 3 of 28 what is the elastic limit if a spring is stretched beyond the limit its doesn't regain its original length when the force is removed 4 of 28 what does the area under a force - extension graph represent the energy stored in a stretched spring 5 of 28 energy stored = 1/2 F changeL 6 of 28 define elastic deformation this is the ability to of a solid material to regain its shape after being deformed by forces 7 of 28 define plastic deformation an object that has been stretched beyond its elastic limit and permanetly stretched. 8 of 28 define limit of proportionality the point up to which the extension is proportional to the fore applied 9 of 28 what does tensile mean deformation which stretches an object 10 of 28 whats does compressive mean deformation that compresses an object 11 of 28 describe brittle a brittle material is one that snaps suddenly without an noticeable yield 12 of 28 examples of brittle materials glass, concrete 13 of 28 do brittle materials obey hookes law for a while then there would be a sudden failure 14 of 28 what is ductile a material which can be drawn out into a wire 15 of 28 example of a ductile material copper 16 of 28 do ductile materials obey hookes law yes because they behave elastically then suddenly acts plastic 17 of 28 what is the yield point the point where that material starts to stretch without any extra load. a place where a large amount of plastic deformation takes place. 18 of 28 what is ultimate tensile stress (UTS) the maximum stress the material can withstand 19 of 28 what is the breaking stress the stress on the material at the point at which it breaks apart 20 of 28 what is strain energy the work done to stretch an object 21 of 28 young modulus equation = stress / strain 22 of 28 stress = F / A force / cross sectional area 23 of 28 strain = change L / L extension / length 24 of 28 the gradient of a stress strain graph is young modulus 25 of 28 is energy conserved when stretching materials yes, always 26 of 28 what does the area under a stress - strain graph show the strain energy (energy stored) 27 of 28 is the stress - strain graph a straight line yes, providing that hookes law is obeyed 28 of 28
Comments
No comments have yet been made