Calculate G Force from 40 lbs Dropped 8 Feet

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SUMMARY

The discussion centers on calculating the G-forces generated when a 40 lbs object falls from a height of 8 feet. The key factor influencing the G-force is the braking distance upon impact; a stiffer surface results in higher G-forces. For example, a disk drive falling onto concrete can experience up to 50 Gs, while a softer surface like a pillow results in significantly lower G-forces. The calculation involves understanding the relationship between acceleration, distance, and the effects of gravity during deceleration.

PREREQUISITES
  • Basic understanding of physics principles, particularly acceleration and gravity.
  • Familiarity with G-force calculations and their implications.
  • Knowledge of material properties affecting impact (stiff vs. soft surfaces).
  • Ability to interpret data from accelerometers.
NEXT STEPS
  • Research the physics of free fall and impact forces.
  • Learn about G-force measurement techniques and accelerometer usage.
  • Explore the effects of different materials on impact forces.
  • Study real-world applications of G-force calculations in engineering and safety design.
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This discussion is beneficial for physics students, engineers, safety professionals, and anyone interested in understanding the dynamics of falling objects and impact forces.

scott35
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Hey everyone I have a question that I'm wondering if it can be answered, I'm not into physics and don't know how to calculate it out. my question is if 40 lbs fell from a height of 8 feet how many G forces would be created on impact. the reason I'm asking is due to a real life scenario. thanks.
 
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It depends on the braking distance at the floor. For uniform accelerations (which is basically the minimal-G-scenario), the product of acceleration and corresponding distance is the same for the free fall and the impact. Then you just have to add 1 to the G-value due to gravity during the deceleration process.
 
G-forces at the floor are due to the interaction of the falling body and the floor. If both are very stiff (hard), then your accelerometer will indicate many g's ... a disk drive falling off of your desk onto a concrete floor may hit 50 g's of acceleration, while it may be only a few if it hits a pillow.

See http://en.wikipedia.org/wiki/G-force
 

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