A 4lb. object free falling 2.5ft would produce an impact force of approx. 10ft-lbs of torque
Force = Mass X Acceleration.
The acceleration of gravity is 32Ft per second SQUARED
So calculate the terminal velocity of a weight falling 2.5 ft
The force exerted is then calculated by how fast the weight takes to decelerate.
If it drops on your foot could be a fraction of a second = big force.
Remember....momentum is conserved.
So, I have my slide rule out, here. I’ll show you what “torque” can do. A four pound iron ball falling off a 2-1/2 foot table will put a blue dent in 4 toes requiring a five inch bandage and a 32 degree ice pack for about two weeks. It might require apologizing to the neighbors for the 100 decibel howl that the toe owner put out. That’s all page 4 in the Post Versalog instruction book. Write it down.