If an object is at rest, then its distance doesn't change as time goes on.
On the graph, the points for each time are all at the same distance. They form a horizontal line.
When you are sitting in a chair your body exerts a FORCE, the chair exerts the SAME force back.
Examples of physical properties include: color, shape, size, density, melting point, and boiling point.
The potential energy that the ball has at the top of the tower is its kinetic energy when it hits the ground. The second ball has more potential energy at the top, because you did more work on it to carry it up there. So it has more KE at the bottom. (A)
