You are correct Doc Al! The force measured is the spring force and I forgot to take into account the initial velocity... really rusty. How do we take into account the initial velocity?
The set up is essentially like this:
---------- (Rigid Anchor)
8 (load cell)
| (connectors)...
Hi Doc Al
I was trying to convert the force in kN into N. Hence I multiplied F by 1000.
The Force in the F-t graph is a resultant force, therefore it includes gravity.
The measurement was based on a load cell that was connected to the "spring". The spring was connected to a mass that was...
Hi All,
Thanks for the interest. I came up with an excel spreadsheet to do some of the calculations based on Doc Al's suggestions. The calculations are described below
Raw data:
t=Time (ms)
dt = Time step (ms) [each time step is 1ms]
Fi=Force at time step i (kN)
M=mass (kg) [This is...
Hi Doc Al,
Thanks for the post. Yes I'm suppose to determine the energy absorbed empirically. Your suggestion is useful. Let me give it a try... Cheers!
Thanks for the posts.
Unfortunately I am tasked to find out the amount of energy absorbed by the spring by using the force-time graph that I have. We are most concerned with the amount of energy absorbed when the spring first stretches until before it rebounds.
I found a similar post on this...
Hi,
Was doing some testing for work, but a lot of my physics are gone! Hope someone can help...
Here goes:
A rigid mass is connected to a spring and the spring to a solid anchor on the ceiling. The mass has an initial velocity vi (due to free fall of the rigid mass). I have the force-time...