Joules and foot/pounds are essentially the same thing.
Joules and foot/pounds are both measures of energy and as such, one can convert from Joules to foot/pounds with a simple multiplication.
1 foot/pound = 1.35582 Joules
Neither foot/pounds nor Joules depend upon cross section.
They both depend solely on velocity squared and mass.
The ONLY difference between the two numbers is that one is calculated using metric measures of mass and velocity while the other is calculated using the English measures of the same quantities.
Neither measure is superior or inferior to the other in any way, nor does one number convey any more or less information than the other.
Joules and foot/pounds are both measures of energy and as such, one can convert from Joules to foot/pounds with a simple multiplication.
1 foot/pound = 1.35582 Joules
Neither foot/pounds nor Joules depend upon cross section.
They both depend solely on velocity squared and mass.
The ONLY difference between the two numbers is that one is calculated using metric measures of mass and velocity while the other is calculated using the English measures of the same quantities.
Neither measure is superior or inferior to the other in any way, nor does one number convey any more or less information than the other.