very good diana..answer the questions that related to this topic.click on box TEST SEMESTER 1..if have any prob, ask me here..i will explain briefly insyaAllah..hope everyone can understand better..
Exactly..very good aiman..let say now we exert a force on the wire which the value of stress not beyond the proportionality limit.. what will happen to the wire if we removed the force that exerted on it?is it obey any law?
Sachini S3T5 The wire will return to its original shape since the proportionality limit is not exceeded. This is similar to obeying Hooke's Law where the extension of spring is directly proportional to the force exerted unless the elastic limit is exceeded.Is this right madam?
Nasha s2t1 1-Ductile materials can be drawn into wire by stretching while brittle materials break,crack or snap easily 2-Ductile materials show deformation while brittle materials do not show deformation Example ductile is copper,aluminium while example brittle is glass
Tan S2T1 Material B has a greater stiffness. Stiffness is the resistance of an object to deform in response to the force applied. A higher young modulus of an object means that the object can withstand a higher force from deformation as Y=Flo/Ae while Y is directly proportional to F. Hence a higher young modulus represents a greater stiffness of an object .
Syafiqah S2T1 strength and stifness is two different things.Stiffness the tendency for an element to return to its original form after a force is applied onto it while strength measures how much stress can be applied to an element before it deforms permanently or fractures
1)STRENGTH/STRONG: material's resistance to permanent deformation/complete breakage under stress
Measured by referring:points of stress-strain graph -yield strength:F of material can withstand without permanent deformation -tensile strength:F of material can withstand when pulled from opposite sides.
2)RIGIDITY/STIFFNESS:measure of elasticity
Measured by referring:gradient of stress-strain graph -Young modulus :⬆️ Force for ⬇️elongation
Thank you madam for the video. Saya lebih faham mengenai tajuk tersebut selepas tengok video.
ReplyDeleteU r welcome..i will upload the test for this chp a.s.a.p to consolidate your understanding okes😃
ReplyDeletetest for chapter 11 was uploaded...now, its time to check your understanding about the concept...just leisure with the basic concept..ehehehe
ReplyDeleteDiana S3T5
ReplyDeleteThank you madam for the vid i understand the chap better
very good diana..answer the questions that related to this topic.click on box TEST SEMESTER 1..if have any prob, ask me here..i will explain briefly insyaAllah..hope everyone can understand better..
DeleteCHECK YOUR UNDERSTANDING...
ReplyDeleteWhat means by proportionality limit?
Aiman F3T3
DeleteThe maximum stress at which strain remains directly proportional to stress
Exactly..very good aiman..let say now we exert a force on the wire which the value of stress not beyond the proportionality limit.. what will happen to the wire if we removed the force that exerted on it?is it obey any law?
DeleteSachini S3T5
DeleteThe wire will return to its original shape since the proportionality limit is not exceeded. This is similar to obeying Hooke's Law where the extension of spring is directly proportional to the force exerted unless the elastic limit is exceeded.Is this right madam?
Perfect!!!!😍😍😀very good..
DeleteSo,is it elastic or plastic deformation occurs-refer to the stress strain graph-consider from initial point until proportionality limit point..
ReplyDeleteElastic or plastic deformation?
ReplyDeleteElastic deformation because it is not pass over the elastic limit yet to become plastic deformation
Deletegood answer..it is because it not beyond the elastic limit yet.so, if the force is removed it can return back to its original state/dimension/length
DeleteFariza S2T1👆
ReplyDeleteSachini S3T5
ReplyDeleteElastic deformation as proportionality limit has not exceeded.
what is the difference between brittle and ductile material?and give examples for both type of the materials.
ReplyDeleteNasha s2t1
Delete1-Ductile materials can be drawn into wire by stretching while brittle materials break,crack or snap easily
2-Ductile materials show deformation while brittle materials do not show deformation
Example ductile is copper,aluminium while example brittle is glass
Very good👍🤩
ReplyDeleteNow discuss from point of view of type of deformation..elastic & plastic deformation for ductile and brittle materials
Sachini S3T5
ReplyDeleteDuctile materials undergo plastic deformation but brittle materials do not show plastic deformation.
👍💯🤩
DeleteYoung modulus of material A and B are 150 Pa & 300 Pa respectively..which material has greater stiffness?Give your reason..
ReplyDeleteTan S2T1
DeleteMaterial B has a greater stiffness. Stiffness is the resistance of an object to deform in response to the force applied. A higher young modulus of an object means that the object can withstand a higher force from deformation as Y=Flo/Ae while Y is directly proportional to F. Hence a higher young modulus represents a greater stiffness of an object .
Very good Tan..👍🤩a material has higher stiffness when greater force need to exert on the material to produce small elongation😃
DeleteHow is about strength and rigid of material?is it same meaning with stiffness?explain your answer
ReplyDeleteSyafiqah S2T1
Deletestrength and stifness is two different things.Stiffness the tendency for an element to return to its original form after a force is applied onto it while strength measures how much stress can be applied to an element before it deforms permanently or fractures
stiffness is the tendency*
DeleteGood answer sya👍😍
DeleteHow does this value are represented in a graph?consider stress-strain graph..is it about gradient/point of the graph?
ReplyDeleteNatasya S2T1
DeleteIt is about the point of the graph.
1)STRENGTH/STRONG: material's resistance to permanent deformation/complete breakage under stress
ReplyDeleteMeasured by referring:points of stress-strain graph
-yield strength:F of material can withstand without permanent deformation
-tensile strength:F of material can withstand when pulled from opposite sides.
2)RIGIDITY/STIFFNESS:measure of elasticity
Measured by referring:gradient of stress-strain graph
-Young modulus :⬆️ Force for ⬇️elongation