G Force upon falling object on impact

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SUMMARY

The discussion focuses on determining the G force experienced by a measurement device when dropped from a height until it goes out of calibration. The device has a mass of 0.59 kg and is dropped from a height of 1 meter onto a concrete floor, where it experiences a force of 1g upon impact. To accurately measure the G force, it is essential to know the deceleration during the stop, which can be measured using accelerometers. The challenge lies in the difficulty of calculating the G force without this critical data.

PREREQUISITES
  • Understanding of basic physics concepts, particularly Newton's laws of motion.
  • Familiarity with G force and its measurement.
  • Knowledge of accelerometer functionality and data interpretation.
  • Basic calculations involving mass, height, and gravitational force.
NEXT STEPS
  • Research the use of accelerometers for measuring impact forces.
  • Study the physics of free fall and impact dynamics.
  • Learn about the calculation of G forces using deceleration data.
  • Explore methods for calibrating measurement devices after impact.
USEFUL FOR

This discussion is beneficial for physicists, engineers, and technicians involved in device calibration, impact testing, and those interested in the practical applications of G force measurements.

kiwisoundguy
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Hi Guys,

I have been asked to find out at what point a measurement device go out of calibration when dropped and express that in a g as in G force.

Its been 15 years since I studied physics (for 3 years), I do rememeber a bit but I need some help..

I have the size and weight (mass) of the device
It is dropped from a set height to a concrete floor. Assume no absortion by the floor.
After dropping we check to see if it still measures properly and if it does, increase the height until the readins is incorrect. At this point we will say the unit can expreience 'x' G force before calibration is required again.

mass=0.59kg
Height = 1m (for example)
Gravity = 9.8 (unless something has changed since I was at school)

What other parameters do I need to know and what formula do I need to use.

thanks in advnance..

Cheers, Ben
 
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You need to know how fast the object stops...that's basically the only information you need.

In other words, during the entire fall, the object is essentially weightless (feels 0 g's), while it is on the floor, it experiences 1g of force acting on it; but most of the g's will come from when the object is stopped by the floor. Without knowing how fast the object stops, we can't tell the g's.
 
Sine you're actually testing, it would be best to attach accelerometers and measure the acceleration. It is extremely difficult to calculate accurately.
 

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