Effect of spring force on acceleration

[jzzdrmr]

Okay, so I am designing a new treadle hammer and I want to know how much force a spring will add to the force of the hammer.

Basically I have an 8 pound head that can either fall at the speed of gravity or be forced down by a 20lb extension spring.

The attached image is not my design and I don't own the image. But, it is similar to what I am doing.

 

[berkeman]

Okay, so I am designing a new treadle hammer and I want to know how much force a spring will add to the force of the hammer.

Basically I have an 8 pound head that can either fall at the speed of gravity or be forced down by a 20lb extension spring.

The attached image is not my design and I don't own the image. But, it is similar to what I am doing.

Welcome to the PF.

The image did not Upload for some reason. Is it a PDF or JPEG?

When thinking of impacts, think more in terms of "impulse" rather that force. You can search for more info on impulse to help out.

If you can get your image to Upload, we can be of more help.

 

[jzzdrmr]

Welcome to the PF.

The image did not Upload for some reason. Is it a PDF or JPEG?

When thinking of impacts, think more in terms of "impulse" rather that force. You can search for more info on impulse to help out.

If you can get your image to Upload, we can be of more help.

I don't know why it won't show up. I tried to upload it on my phone, that's the problem I would guess. Unfortunately I don't have a url for any images. How ever if anyone uses on shape the file is called, sff001. I would also appreciate it if anyone could search treadle hammer and up load that...

 

[jzzdrmr]

Okay so i did a little more googling and think what I am trying to find out is impact force. Basically if an extension spring's max load is 20 lbs and an 8 pound object is pulling on it, does the final mass for impact forge calculating 28 lbs?