How Do I Calculate the Force of a Punch in Ft/lbs?

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Discussion Overview

The discussion revolves around calculating the force of a punch in foot-pounds (Ft/lbs) using data from an accelerometer and other measurements. Participants explore the necessary formulas and concepts involved in this calculation, including force, energy, and impulse.

Discussion Character

  • Technical explanation, Homework-related, Debate/contested

Main Points Raised

  • One participant seeks a formula to calculate the force of a punch using data from an accelerometer, high-speed camera, and mass of the fist.
  • Another participant argues that Ft/lbs is not a direct measure of force and suggests using the formula F = mass × acceleration, referencing the conversion of g's to ft/s².
  • Energy is mentioned as being calculated from force multiplied by distance, and kinetic energy of the fist is proposed as another approach to determine the force.
  • A participant inquires about the specifications needed for an accelerometer to avoid damage during use.
  • A suggestion is made to visit a website that provides equipment for measuring performance in contact sports.

Areas of Agreement / Disagreement

Participants express differing views on the meaning and application of Ft/lbs in the context of measuring force, indicating a lack of consensus on the best approach to calculate the force of a punch.

Contextual Notes

There are unresolved aspects regarding the specific accelerometer data and how it relates to the calculations, as well as the definitions of terms like force and energy in this context.

jaywoo
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I need to calculate the force of a punch for a test I'm running. I have the numbers, but it seems that I have to backwards to find my number!.

I have the force of a punch in G's given by a sensor (accelerometer)

I have Ft/s (feet per second) (high speed Camera) will have anyway by thisafternoon.

I have the mass (6lb moving "fist" on a pnumatic cylinder)

I need Ft/lbs of the punch.

Can anyone give me my formula?

Many Many thanks indeed!
 
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Ft/lbs doesn't mean anything.
If you mean the force than F = mass 8 acceleration , you have that from the acceleromter. 1g = 9.8m/s^2 or 32ft/s^2.
Energy is force * distance, ft*lbs. Or you could get it from the kinetic energy of the fist.
Impulse is force*time.
 
what was the Accelerometer data?

Im looking to get an Accelerometer (40g) and i want to know the spec's i need so that it won't break.

thanks in advance
 
Hi
go to www.prosporttech.com[/URL] we use Herman Digital Trainers for martial Arts, American Football, Rugby and most other contact sports.

Check it out, it should give you every thing you need.

Andy
 
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