6 replies to this topic

[madmax]

Hey Internet...

I'm doing a physics project focused around the crossbow, and I need to know the spring constant of the spring. Does anyone know off of the top of their head? If no one knows I can test it, but I thought that i'd ask first. If no one knows I will post it after I test it in class tomorow. Thanks.

[nerfsharpie6]

Really...I don't think any one on here would know that. I don't even know that and I'm taking Physics as well. I'd imagine it would have to be less than 0.25 Joules but thats just a shot in the dark.

Also what project are you doing? I'm just curious.

EDIT: Also test the spring constant any way even if you get an answer...it'll show that you know how to calculate forces and constants with out help, plus you'd probably get a better answer than on here.

Edited by nerfsharpie6, 01 June 2009 - 10:18 PM.

[Crankymonky]

Really...I don't think any one on here would know that. I don't even know that and I'm taking Physics as well. I'd imagine it would have to be less than 0.25 Joules but thats just a shot in the dark.

Joules is not the unit for the spring constant.

It's

Newtons / meter

or

[unit of force] / [unit of length]

Edited by Crankymonky, 01 June 2009 - 11:06 PM.

[TantumBull]

Contact Zorn or Doom. I'm sure they could answer this question if they've ever dealt with a crossbow spring before.

[nerfer63]

Contact Zorn or Doom. I'm sure they could answer this question if they've ever dealt with a crossbow spring before.

He could also try captain slug.

[Noob 001]

Measure the force applied (use anything that applies a force that you know the exact force figures for, something that weighs 5 Newtons is such an example) and the resultant displacement of the spring. This gives you everything you need to calculate the spring constant, and yuor teacher can see that you know how k is calculated as well.

[Talio]

We're not doing your homework.