1. Speed does not usually stay constant. That is to say, speed can and does change.

2. If you have ever taken any type of trip you would most certainly be able to tell that your speed changed from place to place. You slow down and stop for stop lights, you speed up to pass other cars, etc. –This can be controlled by yourself, or it can be controlled by some outside factor such as wind or the steepness of a hill. In any case, there is no situation where the speed of an object will stay the same from start to end. –This is because it takes a certain amount of energy to move an object at rest and allow it to begin it’s long ascent to gain momentum. You start at zero and end at zero, its as simple as that!

3. This leads us into the two different ways to look at speed. Average and Instantaneous Speed Average Speed –Average speed is simply put the total distance divided by the total time. This assumes instant start and go, which we all know is impossible to attain. –You have to start at zero and end at zero. »THAT’S A LAW OF PHYSICS! Travel 100 miles in 2 hours and your average speed is 50 mph. –You are not going that fast from the instant that you start to the instant that you stop. »Your speed will fluctuate, or change.

4. Let’s look at some of the more interesting aspects of average speed in the form of records. Speed of the Fastest AirplaneSpeed of the Fastest Airplane

5. Just how fast is the fastest Human? When we think of this we most often look at the track and field stars, or football players. –This is because of the fact that speed is the main way that they compare one another to. Speed of the Fastest Human

6. What about the fastest land animal? Everyone knows that it is the Cheetah. –But did you know just how fast it can run? The top speed is 71 mph or 114 kmph. –This this can only be maintained for short distances of about 2-300 meters.

7. Let’s look at the fastest bird and fish. The Peregrine Falcon, at over 200 mph in a dive, is accepted as the fastest bird in a dive, but the Blue-Winged Teal is the fastest in level flight, attaining speeds of close to 70 mph. Peregrine Falcon Hunting Video Peregrine Falcon Hunting Video As for fish the Bluefin Tuna is the fastest of all of the fish in the sea, with the Wahoo and Marlin a close second. Giant Bluefin Tuna

8. And then there was Instantaneous speed. Instantaneous speed is the speed at a specific moment in time. –This can occur at any moment of the recorders choosing. This is used most when people are seeing the fastest speed that can be attained. –How fast is the fastest Car? This is an instantaneous speed!

9. World Land Speed Record It’s 763 mph or Mach1.01