How to work out the spring constant of a frustum

I dont understand how to work out the cross sectional area of a spring when the radius is different. Help would be appreciated

Reply 1

Joinedup

Original post by helpme21

I dont understand how to work out the cross sectional area of a spring when the radius is different. Help would be appreciated

It'd be easier to help if you posted the full question you're stuck with.

if it's a spring made of wire with a round cross section the cross sectional area of the wire is given by ᴨr^2

Reply 2

helpme21

Original post by Joinedup

It'd be easier to help if you posted the full question you're stuck with.

if it's a spring made of wire with a round cross section the cross sectional area of the wire is given by ᴨr^2

https://isaacphysics.org/questions/solid_spring?board=63517771-cbaa-4af6-83e8-822e3987b16c&stage=a_level

Reply 3

Eimmanuel

Study Forum Helper

Original post by helpme21

https://isaacphysics.org/questions/solid_spring?board=63517771-cbaa-4af6-83e8-822e3987b16c&stage=a_level

Original post by helpme21

I dont understand how to work out the cross sectional area of a spring when the radius is different. Help would be appreciated

This post may help. If it doesn’t, you can post your queries here again.

Reply 4

Mathematics8

Original post by Eimmanuel

This post may help. If it doesn’t, you can post your queries here again.

How would you go about integrating the extension sum expression shown in https://www.thestudentroom.co.uk/showthread.php?t=7184744&page=2, im very confused. Do i substitute A(x) into the expression then integrate, how do i integrate that, where x is a power of minus one?. The next steps are just to equate this to F=ke , .