1. Forces and Motion Notes

2. Force- a push or pull on an object or by an object. Examples: pushing a pencil to write lifting a book lifting a book throwing a ball throwing a ball swinging a bat swinging a bat

3. Vector- an arrow that shows the direction and strength of a force. Longer= stronger ….A long arrow shows a strong force.

4. Net Force- total force exerted on an object.

5. 2 equal forces in opposite directions Cancel each other out Object does not move. Net force=zero. Balanced Forces in opposite directions-

6. Forces in opposite directions. Object moves in direction as the strongest force. Net force is the difference of the forces. Unbalanced Forces in opposite directions-

7. Unbalanced Forces in same direction- Forces act together in the same direction Net force is the sum of the forces.

8. Friction- when 2 objects rub together and the force of 1 object is exerted on the other. Friction acts in opposite direction as the objects movement.

9. Inertia- tendency of an object to resist change in motion Example: A pencil will sit on your desk indefinitely if it never experiences a change in forces. A meteoroid will continue its motion in space unless it runs into something or gets pulled in by Earth’s gravity. A meteoroid will continue its motion in space unless it runs into something or gets pulled in by Earth’s gravity.

10. Newton’s First Law of Motion- An object at rest or in motion will not change unless acted upon by an unbalanced force.