Vocabulary

1. Force:  A push or pull exerted by one object on another.
                            

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  Ana did force when she carried the table.

2. Friction: A force that opposes the motion of an object in contact with a surface.

                                                

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  There are many types of friction.

3. Drag force: A force that opposes the motion of an object through a liquid or gas.

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  When he swims he do drag force.                                          

4. Gravity: A force of attraction that exists bewteen all objects with mass.

          

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  There is not gravity in space.

                                                  
5. Net force: The combined effect of all the forces acting on an object.

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  Her project has to be of a net force.

                                                           
6. Balanced forces: Forces that cancel each other out when acting together on a single object.

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     A example of balanced force is the seesaw.                                    

7. Unbalanced force: Forces that do not cancel each other out when acting together on a single object.

                                                                  

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  He do an unbalanced force when he gets down of the bike.

8. Inertia: The tendency of an object to opposse a change in motion.

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  Thank you of the inertia there are many collision of cars.

                                                                  
                                                              
9. Momentum: The mass of an object multiplied by its velocity.

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   I multiplied the momentum of  car.