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Units Units Units
KE=1/2 MV**2
M= lbs Mass or Weight/ 32 ft/sec**2
V= speed in ft/sec or knts*1.7
1000 lbs weight or force = 31.25 lbs mass
100 kts = 170 ft/sec
So KE=1/2*(31.25 lbs mass)* (170 ft/sec)**2
KE= 451,562 ft-lbs
KE=.044WV**2
W=weight in lbs force
V= speed in kts
Again
W=1000 lbs force
V=100 kts
KE=.044(1000)*(100)**2
KE= 440,000 ft-lbs
Very close. The difference is in the froce of gravity which is not exactly 32 ft/sec**2.
I hope this helps.
Ray
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