Force is proportional to the extension of the spring, but in the opposite direction to the extension.
-
-
-
Thank you! But how do we find out what the extension is from the mass and the constant?
-
Well, what's the problem? Mass hanging on a spring in equilibrium?
-
Oh I can't get a screenshot of it on her laptop! She's been asked to work out an equation that requires knowing the mass, the constant and the extension but has only been given the first two.
-
It's probably this problem.https://twitter.com/christianjbdev/status/935240875675979777 …
-
OK, Thanks. I'll show her. See if it makes sense.
-
You could also transpose this into a problem in probability theory, by just making up an answer and then calculating the odds of it being correct.

-
Stop helping.
- 2 more replies
New conversation -
-
-
Are they asking you to calculate its mass per unit length?
-
There's an equation which requires her to know the mass, the spring constant and the extension but we don't have the information for the extension and assume we should be able to work it out from the other two.
-
They either have to give you the extension, or they're asking you to calculate it using Hooke's law: F=-kx.
-
But we don't have force. We just have mass and constant.
-
Is it hanging vertically?
-
It has been dropped and is compressed.
-
What force is acting on the mass to cause the compression?
-
Wait, there's a drop involved? Then you'll need to think about work and energy, not just F=-kx.
End of conversation
New conversation -
-
-
Hmmmm. Who can answer this
@katie_s_ashford@sputniksteve ? -
I assume you come to me for a
#Foucauldian perspective? Or even a general post-post-modernist one? -
You may not know the answers, but you always know who'd know. Ps follow Helen.
End of conversation
New conversation -
-
-
Chop the spring up in infinitesimal slices, weight each of them with the total mass of all slices weighing down on them, and integrate the offset per slice over the slices.
Thanks. Twitter will use this to make your timeline better. UndoUndo
-
Loading seems to be taking a while.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.