HmHow Can I Calculate Force Exerted by a Moving Element?

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To calculate the force exerted by a moving element, the Kinetic Energy Equation (Ke = 0.5 * mass * velocity^2) can be used to determine the force upon impact. The discussion highlights the importance of understanding the specific application, particularly in designing a spring mechanism for a 1 kg slider. The extension of the spring is directly proportional to the force applied, described by the formula F = kx, where k is the spring constant and x is the extension. Testing the spring with known weights can help determine its spring constant if not provided. Understanding these principles is crucial for effective fixture design.
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Hi

In my shop, i have to design a fixture & want to calculate the force exerted by a moving element.

Can anyone let me know the simpliest formula to calculate force ?

Zirok
 
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I would use the Kinetic Energy Equation - Ke = 0.5 * mass * velocity^2

This gives you the N per m^2 the object will exert if its hits something.
 
Welcome to PF!

Hi Zirok! Welcome to PF! :smile:

Force isn't necessarily the important issue.

Can you be more specific about what this fixture is, and why you're worrying about it hitting something?
 
Actually its a slider mechanism.


Slider weighing 1 kg is been loaded by a spring mechanism. To deisgn spring,I am concerned about what amount of force & what travel will be involved so as to design the spring accordingly.

Thanks
Zirok.
 
I don´t understand the system. Could you please eleborate?
 
Zirok said:
Actually its a slider mechanism.

Slider weighing 1 kg is been loaded by a spring mechanism.

To deisgn spring,I am concerned about what amount of force & what travel will be involved so as to design the spring accordingly.

Hi Zirok! :smile:

The extension of the spring is proportional to the force exerted by the spring (which is the same as the tension or compression in the spring).

"Extension" means the difference between the "relaxed" length of the spring and its actual length under force.

So if the "relaxed" length is a, and you exert a force F on it, so that the length changes to a + x (x will be negative if the force is "inwards"), then F = kx, where k is the spring constant for this particular spring.​

(If the spring doesn't come with a spring constant marked on it, you can find it by testing it with some known weights … lay the spring horizontally on a table, and attach known weights to it on the end of a string running over the end of the table)
 
Hm...

Getting your point.

Zirok
 
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