Quote:
Originally Posted by JRMichler
The energy to accelerate from zero to a speed (or decelerate to zero from a speed) is 1/2 X mass X speed^2. ...
Accelerating from 10 to 20 takes three times as much energy as accelerating from 0 to 10.
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I have no problem understanding the math, but rather the paradox that reality shows us.
A rocket in space with a constant weight and thrust will accelerate at a linear rate. Somehow it gains kinetic energy exponentially, but expends energy linearly.
From experience, I can tell you it doesn't take 3x as long to accelerate from 10-20 MPH as it does from 0-10 MPH. This suggests it doesn't take 3x the energy.
Quote:
Originally Posted by freebeard
I hit him square, so the hood was damaged but not the headlights. He pulled over but when I asked about his insurance he remembered he had somewhere to be.
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Perhaps there is a correlation between people who don't plan ahead when approaching red lights, and people who don't plan ahead to get insurance.
It's too bad you didn't have a cattle guard on that Beetle. Maybe he would have learned the lesson then.