Why is it as Humans that we have not yet come up with a way to measure speed?

Speed = Distance / Time

= m/s

km/hr

m/hr

etc

Do you suggest a new unit of measurement such as speeds?

E.G. - I got to work early travelling at 135 speeds

edit: on reflection you might be onto something - E.G. - knots

I think you've done too much speed.

If you really want to delve into this topic you should look up the Heisenberg uncertainty principle. Turns out some very smart people have already tried to find the answer only to come up against a fundamental limit of the universe.

For instance if a vehicle is doing 100kph that just says that if you stay in that vehicle for an hour you will have covered 100 kilometers. It does not actually tell you the speed the vehicle is travelling at.

That is exactly what speed is

Distance = Speed x Time. If Usain Bolt is running at at 12 metres per second for 9 seconds, he has run 108 metres.

Time = Distance / Speed. If Usain Bolt ran 108 metres at a speed of 12 metres per second, he ran for 9 seconds.

Speed = Distance / Time. If he ran 108 metres in 9 seconds, his speed was 12 metres per second.

If you travel 87 Kilometres in 38 minutes and want your speed in Km/H. First convert the 38 minutes into hours by dividing by 60 and then your speed will be 87 / 0.63 = 138 Km per Hour.

You could ask how long does it take a car going 138 Km/H to travel 87 Km. Distance divided by speed. 87/138 = 0.63 of an hour.

What distance will a car travel if it is moving at 138Km per hour for 0.63 of an hour. 138 Km per Hour * 0.63 Hours = 87Km.

If a caterpillar can travel the length of 13 AA Batteries in 42 seconds, how fast is it travelling in AA/Min? We want the speed, we know the distance expressed in AA Batteries, and we know the time in Seconds. Convert the time to minutes (0.7). 13/0.7 = 18.57 AA/Min.

I feel the need, the need for the bus that couldn't slow down.

Aircraft have two ways of measuring it,

Airspeed and ground speed.

I have one coming up for possessing speed, same question?

Tell me you don't know how speed is measured by... telling me you don't know how speed is measured.

Wait until I tell you that when you accelerate, you change the rate of speed over time, m/s/s or km/hr/hr!

The OP needs to look up the base units of the SI system. Every unit of measurement, no matter the application, is made up from some combination of metre, second, kilogram, kelvin, candela amp or mole.

This is not true. We have practical limitations when measuring speed, so what we actually measure is the average speed for a very short time interval, but that doesn't mean speed or movement are not continuous. So when something is moving at some speed, the distance travelled will be zero for a time interval of zero, but that doesn't mean that there is no instantaneous speed.

Pitot tube measures pressure, from which you can calculate speed. But it is a direct instantaneous measurement as it doesn't need a time difference.

Correct, it measures pressure (and pressure difference), but it doesn't need a time reference. Time is also not measured directly, instead we count pulses of a known frequency, generated by a mechanical, electronic or even atomic device. Pretty much any measurement is either by comparison with a known measure (length, mass) or by observing its effects on something else (temperature, pressure, voltage), and then again measure by comparison with a known measure.

Pitot measures pressure, which can then be used to calculate velocity

The old how long is a piece of string.

Think thread reminds me of another forum I was on years ago where a girl asked "Why is lava wet? Surely at that heat all the water would evaporate and it would turn solid"

OP, recalling my leaving cert & engineering physics, your initial query may not be as daft as it initially appears imho.

As there are actually many uncertainties in our 'known & observed' universe. (Whatever that actually is, since we are by definition observing that through the prisms of our own perceptions, constructs & the limits of these & our devices to measure such, etc, etc)

For instance, iirc, the dimensions of space & time & the effects of gravity & the like warp & change their fundamental characteristics as items that have mass such as matter, approach the speed of light. So hence phenomena like black holes, where even light appears to act like matter, & is governed by gravity etc, etc.

A rather bright German chap had a theory of relativity about all this kinda stuff that created quite a fuss back in the day.

Also is light made up of protons or waves!?! Answers via fibre optic comms only please ;)

And are electrons here or there? Iirc, if you actually locate one, you can't measure it's speed, wavelength or charge or something else about it. Pesky little sub atomic things those blooming elusive electrons!!!

So it turns out that our perception & measurement of things in our physical universe are not nearly as absolute, or universal, as many people seem to think.

Nonetheless the relative measurement of speed is fairly set in stone, excuse the pun, and particularly so if you unfortunately happen to run into such a stone at 80 m/s, knots, mph, or even little old leisurely kph. That would be pretty definitive imho....

Something mildly interesting brought to you by the mean value theorem:

If you travel a distance of 100 miles in one hour (going at any speeds you want on the way to make that journey in that time), you must have travelled at 100 mph at least once on the journey.

Not immediately obvious but interesting if you think about. The mean value theorem is one of the most important things in Calculus.

And the speedometer in your car is lying to you. You are not travelling as fast as it's telling you, that really annoys me.