7.62x51 NATO bullet pull spen

[Steve Shannon]

OK, I'll bite...

If its 57.5lbs moved a meter (3.28 feet), then isn't that 57.5lbs x 3.28 ≈ 189 foot-pounds?

What you’re referring to is work, rather than force.
If you had to apply 57.5 lbs the entire time to move the bullet one meter, then yes, you would have done 189 ft-lbs of work.
But all the previous statement mentioned was the force required to pull the bullet. And to convert from Newtons to pounds of force doesn’t consider the distance. Simply divide Newtons by 4.45 to get pounds.
You could certainly calculate the work to pull a bullet. If the force is constant the entire distance then it would be the force x the distance.


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