The Student Room Group
Uni students - Complete our survey >>
Uni students - Complete our survey >>
Uni students - Complete our survey >>

Official PHYA2 AQA Spec A Thread June 09 2014

Scroll to see replies

Can anyone explain this? dont get it at all , probably really simple, is it because the gradient is not constant?
c1.PNG97.8KB
Original post by Chris654
Can anyone explain this? dont get it at all , probably really simple, is it because the gradient is not constant?


My answer:'As the extension returns to zero when the load is removed'

Explanation: This means that there is no permanent extension, so no plastic deformation has occurred; the material is the same length once you have stopped stretching it as if it had never been stretched at all. As a result, the deformation is all elastic.

If plastic deformation had occurred, the extension would not return to zero when the force was removed i.e.:
http://imgur.com/3FSvzOG
(sorry my scanner is poor)
Original post by InvertedMountain
My answer:'As the extension returns to zero when the load is removed'

Explanation: This means that there is no permanent extension, so no plastic deformation has occurred; the material is the same length once you have stopped stretching it as if it had never been stretched at all. As a result, the deformation is all elastic.

If plastic deformation had occurred, the extension would not return to zero when the force was removed i.e.:
http://imgur.com/3FSvzOG
(sorry my scanner is poor)


Cheers mate! Makes sense now thanks :smile:

Quick Reply

Related discussions

Latest

Trending

Trending

Articles for you