1. Vocabulary
Owen Graham

2. Force Definition-A push or pull Sentence-A truck exerts force on a car
Key word-work

3. Newton Definition-SI unit of force
Sentence-A gear exerts newtons on other cogs
Key word-force

4. Net Force Definition-The combination of all forces acting on an object
Sentence-the books net force -2 newtons
Key word-force

5. Unbalanced Forces
Definition-whenever there is a net force acting on an object the forces are unbalanced
Sentence-there are unbalanced forces acting on the rocket
Key word-thrust

6. Balanced Forces Definition-Equal forces acting on one object
Sentence-there are balanced forces acting on the book
Key word-net force

7. Friction
Definition-the force that two surfaces exert on each other when they rub against each other is called friction
Sentence-the block is undergoing friction
Key word-resistance

8. Static Friction
Definition- The friction that acts on objects that are not moving.
Sentence- Static Friction is acting on the yellow block
Key Word- not moving

9. Sliding Friction
Definition-occurs when two solid surfaces slide over each other.
Sentence-Sliding friction is exerted on the blocks.
Key word-Resistance

10. Rolling Friction
Definition- A force which opposes the motion of any body that is rolling over the other.
Sentence- The grey block is undergoing rolling friction
Key word-Resistance

11. Fluid Friction
Definition- Resistance to an objects motion through a liquid
Sentence- The yellow block is undergoing fluid friction
Key word- Resistance

12. Gravity
Definition- Gravity is a force that pulls objects towards one another.
Sentence- The moon is caught in the earth’s gravity.
Key word- Pull

13. Mass Definition- The measure of the amount of matter in an object.
Sentence- Atoms have very little mass.
Key word- size

14. Weight
Definition- The force of gravity on a person or object on the surface of a planet.
Sentence- The 3lbs. Weight has a high weight.(not really)
Key word- Heavy

15. Free Fall
Definition- When the only force acting on an object is gravity an object is said to be in free fall.
Sentence-The whale is in free fall.
Key word- Falling

16. Air Resistance Definition- A type of fluid friction.
Sentence- The car is experiencing air resistance.
Key word- friction

17. Terminal Velocity
Definition- The greatest velocity an object reaches is called Terminal velocity.
Sentence-The ball has reached terminal velocity.
Key word- Speed

18. Projectile Definition- An object that is thrown.
Sentence-The vomit is a projectile.
Key word-Thrown

19. Inertia Definition-An object’s resistance to a change in motion.
Sentence- The large stone’s inertia resisted a change in motion.
Key word-Still