gravitational potential energy

So if I make a plot of the gravitational potential energy as a function of y, then I would get a straight line.

Now, what we would like to do is we would like to convert all this gravitational potential energy into kinetic energy of that disk.

As material spirals down to the innermost orbit of an accretion disk, it must give up gravitational potential energy.

Notice that the gravitational potential energy increases.

Let me first give you the formal definition of gravitational potential energy.

So you're using, then, the conversion of gravitational potential energy to kinetic energy.

When I'm here, gravitational potential energy ; increases in this way; the gravitational force is in this direction.

So this is a function y as a function of x and the curve itself represents effectively the gravitational potential energy.

Notice the gravitational potential energy goes down.

When I'm here, the gravitational potential energy increases in this direction.

You can install a disk in your car, which I would call, then, a flywheel, And you can convert the gravitational potential energy.

Hence, the loss of gravitational potential energy of the block equals the gain of elastic potential energy of the spring.

Then this will have a positive gravitational potential energy, and this will have one that is higher than this one by this amount.

y And this is y. . . Then the gravitational potential energy u This is u.

We will, many, many times in the future, use the one over r relationship for gravitational potential energy.