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Hazelton, Kansas | As the others said, KE = 1/2 * Mass * Velocity * Velocity
In English units, 40,000 lbs = 1242 Slugs, and 7 mph = 10.26 ft/sec
So, the kinetic energy of a 40,000 lb tractor moving at 7 mph is ~65,400 ft-lbs.
For comparison, kinetic energy of a 150 grain 30-06 slug at the muzzle is about 2800 ft-lbs.
And yes, a nylon rope with a pintle hitch and failed mounting plate on the end can take half your head off, with enough energy left over to bend a cab ROPS post out.
We need a few more assumptions to be able to estimate rope tension.
Be careful out there, gang.
MDS
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How much energy stored in a moving vehicle?
