ENGAA

https://www.undergraduate.study.cam.ac.uk/files/publications/engaa_s1_question_paper_2016.pdf

Hi, im struggling to do question 51- I have tried drawing it (have a horizontal parabola) and a straight line but where do i go from there?

For 53. Search for Descartes rule of signs

Bro question 51 or 53 the area under graph is ****ed up. U equate both function to find out the intersection is at y equal 0 and 2. Then u realize the x equals 7 is always bigger than the other function . So integrate 7 minus the other function from y equals 2 to y equals 0. That question cannot be done in 90 seconds . Don't bother

yup I hardly get it and tbh yh timing is so messed up I don't get how anyone could finish the test, Im just aiming for 50% now if im lucky

Bruh can u tell me why spring 3 is the answer to "
which sample does not obey hooke's law up to 2 percent strain"

what question?

2016 section 2 question 1

well basically I did x/(delta)x= 2% = 0.02
since x= 100mm you can work out (delta) x and from there you can look at the graph at that extension and see which isn't a straight line

I thought strain is equals to Delta x/ x?