Roller Coaster

3. material that was used to build the first roller coasters
5. the branch of science concerned with the nature and properties of matter and energy.
9. How quickly an object speeds up, slows down or changes direction. Is equal to change in velocity divided by time.
12. The energy stored by an object ready to be used. (In this lesson, we use gravitational potential energy, which is directly related to the height of an object and its mass.
14. what people do when riding a roller coaster
15. A twisting force
16. use friction to stop a vehicle
17. measurement of the amount of pounds
18. A force caused by a rubbing motion between two objects.
19. The energy of an object in motion, which is directly related to its velocity and its mass.

1. A combination of speed and the direction in which an object travels.
2. Also known as a gravitational force. Is equal to the force exerted on an object by the Earth's gravity at sea level.
4. objected tested in our experiment.
6. How fast an object moves. Is equal to the distance that object travels divided by the time it takes.
7. amount of motion that an object possesses
8. first roller coasters
10. tendency of an object to remain at rest
11. Any push or pull
13. a force that is caused by air. The force acts in the opposite direction to an object moving through the air.
20. a force that draws any two objects toward one another.