00:01
So the average acceleration, which i'm going to denote average a, is equal to our change in velocity divided by our change in time.
00:11
So here, our change in velocity was equal to 260, and this was in kilometers per hour minus zero kilometers per hour, since we were told it went from zero to 260 kilometers per hour in two seconds.
00:28
And so what we want to do here is we want to actually.
00:31
Convert this kilometers per hour into meters per second.
00:36
So since this is equal to 260 kilometers per hour, we're going to multiply by 1 ,000 meters per one kilometer, and then by one hour per 60 minutes, and then by one minute per 60 seconds, so that we can get this value into meters per second.
01:04
So 260 times 1 ,000 is 260 ,000.
01:09
So this would be equal to 260 ,000 divided by 3 ,600.
01:15
And this is in now meters per second.
01:22
So if you plug this into a calculator, 260 ,000 divided by 3 ,600 is equal to 72 .2 .2 repeating, and this is in meters per second.
01:39
And so now that we have this average velocity in meters per second, we can go back and look at our average acceleration equation, which is equal to our average velocity divided by our average, or sorry, our change in velocity, divided by our change in time...