¶ Hammerthrow
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Index Entry
There are two kinds of acceleration in physics. Of all the physical Universe there are only two basic kinds. One is what is called linear acceleration and the other is angular acceleration. When you take a hold of a steel ball on a rod, we call it a hammerthrow in sports events, you start spinning it around you. That is an angular acceleration and you measure it in terms of the cycles or fractions of circles as it goes round in a circle. If you have a piece of pie, those are angular accelerations. . . .
When you let go and it goes away from you, it is now linear acceleration. All of our rockets are linear acceleration and all our firings are calculated in terms of the linear. As something goes away from you like a rocket all you can see is a little speck and then it goes away. The only way you know where it is is in terms of knowing at what angle it went off, and how fast it goes, and you can look at the clock and you find it is so many cycles of the clock and the linear accelerations are measured in increments.
