# AP Physics 1/Kinematics/Representing Motion Part 1

This lesson is still under construction. Feel free to edit this page, but please read AP Physics before you edit. |

Now that you have a good grasp of vectors and scalars, it is time to dive into understanding and representing motion, which is what Kinematics is all about. In this lesson we learn about the first part in representing motion. We will learn about |

## Example A[edit | edit source]A rabbit hops 100 meters north to eat a piece of lettuce. It then hops 400 meters east to eat a carrot. What is the rabbit's distance from the starting point, in physics terms? ## Example B[edit | edit source]A rabbit hops 100 meters north to eat a piece of lettuce. It then hops 400 meters east to eat a carrot. What is the rabbit's displacement from the starting point? ## Example C[edit | edit source]Image a number line marked from 0 to 10. A person is at the mark 0. The person walks 7 units, then -5 units, and finally 6 units. What is the person's position? |

By now you should have done all the example problems. Let's take a look at the correct way to do them, and what we learn from these problems.
## Solution[edit | edit source]A rabbit hops 100 meters, then 400 meters. Therefore 100+400=500, and the distance is So distance is the total distance the object moves. In other words, you add up the distance (whether in meters, miles, kilometers, etc.), no matter if the objects turns or not, to get the distance. Distance is a scalar quantity.
## Solution[edit | edit source]We notice it is the same problem, but it is asking for displacement instead for distance. We also know displacement is a vector quantity. So therefore, by the Pythagorean Theorem, the answer is
So we have a number line. The person is at 0. If he walks +7 (right 7) units, he will be at mark 7. Then he walks -5 (left 5) units, he will be at mark 2. Finally, if he walks +6 (right 6) units, he will be at So here is what we have learned. |