(Picture from here)

Continuing from my previous article, here are some more real world physics for “truthers,” as opposed to the Wile E. Coyote physics they use.

As I pointed out in my previous article, mass doesn’t move mass, force does, and , per Newton’s Second Law of Motion, Force equals mass times acceleration, written as F = ma (source). Force is measured in Newtons (reference). The same source gives this definition of a Newton: “One Newton is defined as the amount of force required to give a 1-kg mass an acceleration of 1 m/s/s.” 1 m/s/s is another way of saying 1 m/s-squared. This means that a one-kg mass would have a force of 10 Newtons (N).

Oh, and when the upper floors made contact with the lower floors, the force had to have increased as well. How do I know this? It’s quite simple. Take the upper 16 floors of the north tower, which would have been floors 94-110, plus the roof and anything on the roof. Floor 93 had the mass of floors 94-110 to contend with, floor 92 had the mass those 16 floors PLUS the mass of floor 93, and so forth. Now, if force = mass times acceleration, and mass is increasing (17 floors have more mass than 16 floors, and so on), then, LOGICALLY, force must also increase. .

We also have acceleration which is defined as the change in velocity over time (reference). Remember, speed and velocity aren’t the same. 5 meters/second is speed, 5 m/s due north is velocity. In physics, it’s quite possible to have a constant speed but be accelerating. For example, a car going around a circular track at a constant 10 m/s would, in point of fact, be accelerating despite the fact that the speed never changes as the direction would constantly change.

This means that, in one’s car, the gas pedal is not the only accelerator. The brake pedal can be considered an accelerator as well. After all, when you slow down, it takes time and your velocity clearly changes. The steering wheel and, in the case of a manual transmission, the clutch, can also be considered accelerators, as they are all used to change the cars position at a given rate.

Of course, there’s one other detail- in physics, we also have a thing called work- not to be confused with the 9 to 5 type of work. As we see from the quote here, physics defines work as “… the force exerted multiplied by the distance, or W=FD.” Another quote from the same source states that “In physics, work is done only when an object is moved in the direction of the applied force.”

One example is if I get behind my car and push it while the emergency brake’s on, the car won’t move, so no work is done. However, if I take the emergency brake off and push my car 3 meters, I have now done work on the car.

Here’s another example. Say I have a box with a string attached to it at a 45 degree angle. There are several forces here. Let’s say I have a 1 kg box, and I drag it east about 10 meters. Now, let’s say that we have an upward force of 6 Newtons (from the string), an eastward force of 4 Newtons, a frictional force of 2 Newtons, and a gravitational force of 10 Newtons. Since work is only done in the direction of the applied force (meaning that only the direction of the motion counts for the work done) the actual work done on the box would be 4 Newtons times 10 meters for a total of 40 joules.

Of course, the lower floors of the Twin Towers had TWO forces doing work on them- one was obviously the force of the upper floors, which was clearly a downward force. What “truthers” forget is that the force of gravity, which is ALSO a downward force, did work on the lower floors of the Twin Towers as well. So given the work done on them by both the collapsing upper floors and gravity, unless this is a Roadrunner cartoon where Wile E. Coyote walks off the cliff but doesn’t fall until he looks down, the lower floors of the Twin Towers didn’t stand a chance.

(Picture from here)

Now, if you’ll excuse me, I’m off to go paint a tunnel on solid rock.