Archive for September 15th, 2007

Basically I just went to see the U.S. Air Force Thunderbirds down at the beach. ^ ^ Very awesome and very loud at the same time. I know a tiny bit about planes from sixth grade and it applies to Newton’s first law of motion!

Before I try to explain the connection…
Definition of Newton’s first law of motion straight out of our Principles of Physics text: “Every body perseveres in its state of being at rest or of moving uniformly straight forward except insofar as it is compelled to change by forces impressed.”

Ok, so at a constant altitude (taking those big dives and turns out of the picture), we have thrust and drag (forces acting on plane). If thrust equals drag, there is no net force on the plane and in such a case, a Thunderbird would be traveling at a constant, unchanging velocity.

Let’s say however, that the pilot decides to increase the thrust. Than that force will be greater than the drag force, making the plane’s velocity change. So as seen, “forces impressed” have made the Thunderbird accelerate! Amazing!!

My Short Video! Better than a picture even if a little out of focus. : )

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