Yet more Real World Physics, not "Truther" physics

 Since the “truthers” still seem to have trouble with physics, I’ll elaborate on a previous article.

“Truthers” use conservation of momentum to sound smart and attempt to prove that you cannot move more with less.  However, this is totally false, as things like levers and pulleys allow a person to do exactly that. Well, that, and using “truther” logic (yes, I know that’s an oxymoron), it should be impossible for a person to push a car, yet it can be done. I know because I have occasionally had to push my car when it broke down.  Oh, and before some “truther” makes the obvious statement that cars have wheels, that doesn’t change the fact that a car is heavier and more massive than a person.

The reason I say heavier and more massive is, because, although they are often used interchangeably, mass and weight are NOT the same thing.  Mass is the amount of matter in an object, and NEVER changes. Weight is the effect of gravity on a given object. For example, let’s say a person weighs 176 lbs on Earth. It takes 2.20 pounds to equal one kilogram (again use this to find the conversion factors), so a 176 lb person has a mass of 80 kilograms.  Now, if you put that same person on the moon, which has one-sixth the gravity of Earth, they would weigh about 29 pounds, but their mass would still be 80 kilograms.

Now, as for momentum, it is a fact that when two objects collide, they will continue in the direction of the object with the largest momentum- which is not necessarily the largest object.  As we know momentum is mass times velocity (velocity and speed are NOT the same either- 65 MPH is speed, 65 MPH due north is velocity; speed doesn’t have direction, velocity does), so let’s use this example. Let’s say, for the sake of argument there’s a Hummer weighing 4000 lbs 1818 kilograms and heading due north at  8.94 meters/second.

Now, say, there’s some person totally drunk, driving a car that weighs  909 kilograms and doing  31.3 meters/seconddue south on the wrong side of the road, and the two cars collide head on.  The Hummer would have a momentum of 1818 kg (8.94 m/s due north) for 16, 253 kg m/s due north.  The smaller car would have a momentum of 909 kilograms (31.3 m/s due south) for 28,452 kg m/s due south.  

As you can see,  the smaller car has the larger momentum ( last time I checked, 28,452 was larger than 16,253, respectively), so upon the collision, the small light car would shove the large, heavy one due south.


Posted February 2, 2008 by Victor Chabala in Real 9/11 Facts

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