Today I was thinking about kinetic energy (Ek), for no reason in particular.
I did a little bit of math to determine that the kinetic energy of the shell leaving the barrel of a 105mm artillery piece was approximately 10,000kg-m/s (somewhere around 15kg projectile with a muzzle velocity of approximately 670m/s), which is a fair bit of kinetic energy. Since, in the old days, the energy contained in the projectile was all that was used to knock buildings down and destroy people utterly (and fairly successfully), I assume that 10,000kg-m/s is a fairly destructive amount of Ek.
Then I started thinking about our bikes.
Let's say that the average sportbike, with a rider, weighs about 600 pounds. That's probably a little on the light side, but let's run with it. That's about 272 kilograms.
Now, how many of us can say we've never broken 100MPH (160km/h) on our bikes? Not many, I'm guessing.
100MPH is about 44.7 meters per second.
At 100MPH, the average sportbike therefore has in excess of 12,000kg-m/s of kinetic energy.