![]() ![]() I tried to pull the handle harder, but it wouldn't give. I tried to open it and it wouldn't budge. I saw the door to a room, the handle was a big metal thing that seemed to jut out of the wall. I had never been here before but I knew the way to the nearest exit. If we want it to start going an extra 2m every second for each second we push it, rather than just 1m, we need to push harder. If you want to understand intuitively why the kg and m are multiplied together, if we have more mass we need to push harder to get it to speed up. Putting this all together, 1 kg m s -2 means that we are taking one kilogram of mass and every second we are increasing how fast it is going so that at the end of that period it will be travelling one more metre every second than it was at the start of that period. So how quickly we speed up will be how many metres per second our speed is increasing by every second, so metres per second per second, or metres per second-squared. So how fast something is going is measured in metres per second - how many metres every second. We measure distance in metres, and time in seconds. To know how fast something is going we have to measure how far it has gone in a particular time. To speed it up we have to change how fast it is going. Which is why I relegated hard sciences to minors and soft science got my major. Unfortunately, my physics profs and half my chem profs were not this good. It takes either trust or apathy to get through it. They knew what you meant, explained the pedagogy, promised, then provide the answers when promised. But we have to teach you to crawl here in 110, next semester you’ll walk in 235, and we can have some real fun in 300 and 400” We answer that in Econ 235 and it makes a much better model for future work. I had some good Econ profs who when you give a ‘well what about…” question will tell you honestly “great question. We quickly add back in things in the next semester, and sometimes unlearning is the hardest part of the first semester. But it requires disregarding things that are obvious to even an untrained observer of natural phenomena. We have to start with a very big, broad picture to get the very basics. It’s common in a lot of 100 level sciences, from chemistry to economics. I mean, I’m pushing pretty hard on this building, how are you telling me there’s no force?Īnyway I probably put too high an expectation on five year olds and someone probably did a better job by now. ![]() My hardest concept (still) is ‘how is there no force if there’s no change in velocity. We just put in base units from velocity to acceleration to time up to Force, which a derived unit. Just walking through the steps and ideas demonstrates how we arrive at the kg Force is (kilograms, a measurement of mass) times (m/s2, a measurement of acceleration). So now that we built the ‘m’ and ‘a’ parts, let’s put them together.įorce is mass times acceleration. The velocity and change in velocity are in the same second so it is logical to square up. And since that’s a lot to write, let’s just say meters/sec 2. So acceleration is really (meters per second per second) Or switching that to our more mathy view, meters/sec/sec. So acceleration is (change in velocity) ‘per’ second also written as (change in velocity)/second. Let’s say how much it changed in a second. Next part is where it gets a little tricky. In fact, we are building machines for ants so we are going to just stick with kilograms. Si is pretty set on grams and kilograms so let’s just go with them. Does that make sense? If so hang on tight to that. In your case I think you are overthinking rather than under thinking.įorce is what we call matter (mass) as it is accelerated. Type in unit symbols, abbreviations, or full names for units of length, area, mass, pressure, and other types.It’s hard to explain because when it ‘clicks’ the difficulty becomes forgotten. You can find metric conversion tables for SI units, as well as English units, currency, and other data. kilogram per (square meter) to foot waterĬ provides an online conversion calculator for all types of measurement units.kilogram per (square meter) to dekapascal.kilogram per (square meter) to dyne/square centimeter.kilogram per (square meter) to exapascal.kilogram per (square meter) to hectopascal. ![]() kilogram per (square meter) to megapascal.kilogram per (square meter) to inch of mercury.kilogram per (square meter) to kilopascal.Newton/square meter to kilogram per (square meter), or enter any two units below: Enter two units to convert From: You can do the reverse unit conversion from
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