Effect of spring force on acceleration

AI Thread Summary
The discussion centers on the design of a treadle hammer and the impact of spring force on acceleration. The user is trying to determine how much additional force a 20-pound extension spring will contribute to an 8-pound hammer head, particularly in terms of impact force. They seek clarification on whether the total impact force should be calculated as 28 pounds, combining the spring's maximum load with the hammer's weight. The conversation also touches on the importance of understanding impulse rather than just force when considering impacts. Overall, the user is looking for insights on calculating the effective force during the hammer's operation.
jzzdrmr
Messages
3
Reaction score
2
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.
search

The attached image is not my design and I don't own the image. But, it is similar to what I am doing.
 
Engineering news on Phys.org
jzzdrmr said:
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.
search

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. :smile:

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.
 
berkeman said:
Welcome to the PF. :smile:

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...
 
Last edited by a moderator:
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?
 

Thread 'Race car suspension Class'

Posted June 2024 - 15 years after starting this class. I have learned a whole lot. To get to the short course on making your stock car, late model, hobby stock E-mod handle, look at the index below. Read all posts on Roll Center, Jacking effect and Why does car drive straight to the wall when I gas it? Also read You really have two race cars. This will cover 90% of problems you have. Simply put, the car pushes going in and is loose coming out. You do not have enuff downforce on the right...
View full post »

Thread 'Cantilever help'

I'm trying to decide what size and type of galvanized steel I need for 2 cantilever extensions. The cantilever is 5 ft. The space between the two cantilever arms is a 17 ft Gap the center 7 ft of the 17 ft Gap we'll need to Bear approximately 17,000 lb spread evenly from the front of the cantilever to the back of the cantilever over 5 ft. I will put support beams across these cantilever arms to support the load evenly
View full post »
Thread 'What's the most likely cause for this carbon seal crack?'

Thread 'What's the most likely cause for this carbon seal crack?'

We have a molded carbon graphite seal that is used in an inline axial piston, variable displacement hydraulic pump. One of our customers reported that, when using the “A” parts in the past, they only needed to replace them due to normal wear. However, after switching to our parts, the replacement cycle seems to be much shorter due to “broken” or “cracked” failures. This issue was identified after hydraulic fluid leakage was observed. According to their records, the same problem has occurred...
View full post »

Similar threads

Find the force acting on the roller in the direction of the spring
Replies
14
Views
1K
Solving Torsion Spring Problem with 100 lb Force
Replies
3
Views
3K
Convert moment force at lever support
Replies
1
Views
2K
Understanding and Troubleshooting Handlebar Load Calculations
Replies
28
Views
2K
Understanding Skeet Thrower Mechanics: Spring Selection and Release Velocity
Replies
12
Views
3K
Total elongation of differently shaped "springs"
Replies
1
Views
1K
Spring+mass to do known job. How dimension? Impulse? Energy?
Replies
18
Views
2K
Why can we move the spring with constant speed when we apply a force?
Replies
29
Views
2K
Springs and Pulleys - Force analysis
Replies
18
Views
1K
Automotive Steering Force, Determining the Lever Arm
Replies
9
Views
1K

Hot Threads

Recent Insights

Back
Top