How can I tell the speed of a moving vehicle?
I think I saw a UFO and I'm very curious to see if I can calculate the speed of the object moved. My main factor behind this is that the noise of the engine was heard at least 1.5 seconds after the craft passed. Does that mean he was traveling faster than the speed of sound? I have very little knowledge of physics and such, so any help is appreciated. Thank you.
Unfortunately, based solely on the delay of sound, it is impossible to judge how fast the vehicle was in motion. you need to know how high the engine flew, and the exact time period between when it passed directly overhead, and the highest point of the sound. even with all this, you not win a general approximation of its velocity. the fact that there was a delay of sound at all does not mean he was going faster than sound, it could be simply because he was so far away. like when a friend moves once through a football field and the sound is just a little late, it's only because its Travel is not as fast as one might think. the speed of sound is 770 miles per hour, but if a plan is 3,000 feet in the air, you could get significant delays.
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