And once it was sort of explained to me how fast we were using up the world's resources,

Speed, speed!

The question is how rapidly will China s authorities allow the renminbi to appreciate.

FlNAL VELOClTY SQUARED, FlNAL VELOClTY TlME FlNAL VELOClTY

Speed, François! Speed!

CHANGE IN VELOClTY IS THE SAME THlNG AS FlNAL VELOClTY MlNUS INlTIAL VELOClTY

The height here is my final velocity minus my initial velocity.

With regard to excessive speeding, for example, statistics have shown over the years that speeding is the number one killer.

The average velocity is just the initial velocity plus the final velocity over 2.

Vi plus Vf (No that's not the right color)

This is analogous to throwing a ball and using the speed at which it is travelling at a point in time to estimate how hard it was thrown.

Now we can take away this and I would like to show you the rate of speed, the rate of change, how fast they have gone.

Well the velocity is just, what's velocity?

And let me plot its velocity against time so this is my velocity

We know also that velocity, or let's say the change in velocity, is equal to the final velocity minus the initial velocity.

Assuming that we start with... so my initial velocity, or I could say the magnitude of my initial velocity so just my initial speed, you could say, this is just a fancy way of saying my initial speed... ...is zero

It's not the velocity. It's the magnitude of velocity

So we say 84 is equal to velocity times your initial velocity times time.

So this is the velocity.

Speed limit

Speed

Speed

Speed

Speed

Stopped

Spin speed

X speed

Y speed

Kyoko Iwashita.

Speed!

Speed.

Speed.

Speed! Speed!

That's it!

Speeding.

Speed

So these two terms this term and this term will simplify to 1 2 Vi, 1 2 the initial velocity plus 1 2 times the final velocity.

It is our final vertical velocity, minus our initial vertical velocity.

IS THE FlNAL VELOClTY INlTIAL VELOClTY OVER TWO.

Now, since the velocity is changing, we're going to say the average velocity.

The average velocity is just the average of the initial velocity and the final velocity.

NOW ONCE AGAlN, WE KNOW THAT INlTIAL VELOClTY IS ZERO, SO OUR CHANG IN VELOClTY IS SAME AS FlNAL VELOClTY

Speed is the magnitude of velocity. It doesn't take into account the direction.

This is an example of a real meteorite, and you can see all the melting of the iron from the speed and the heat when a meteorite hits the earth, and just how much of it survives and melts.

SAN FRANCISCO Even if young people think they are immortal, they can t help but notice how fast their pets age.