1. Force and Motion Vocabulary Week 3

2. CCGPS  S8P5a. Recognize that every object exerts gravitational force on every other object and that the force exerted depends

3. Newton’s First Law of Motion  States that an object at rest will remain at rest, and an object at a constant velocity will continue moving at a constant velocity, unless it is acted on by an unbalanced force.  An object at rest will stay at rest, an object in motion will stay in motion unless acted on by a force.  https://www.youtube.com/watch?v=LEHR8YQNm _Q https://www.youtube.com/watch?v=LEHR8YQNm _Q

4. Inertia  The tendency of an object to resist a change in motion.

5. Newton’s Second Law of Motion  Acceleration depends on the object’s mass and on the net force acting on the object.  https://www.youtube.com/wat ch?v=ZvPrn3aBQG8 https://www.youtube.com/wat ch?v=ZvPrn3aBQG8

6. Newton’s Third Law of Motion  States that if one object exerts force on another object, then the second object exerts a force of equal strength in the opposite direction on the first object.  For every action there is an equal but opposite reaction.  https://www.youtube.com/watch?v=EgqcGr B3re8 https://www.youtube.com/watch?v=EgqcGr B3re8

7. Action Force  The force acting in one direction.

8. Reaction Force  The force acting in the opposite direction.

9. Normal Force  The normal force is the support force exerted upon an object that is in contact with another stable object.  For example, if a book is resting upon a surface, then the surface is exerting an upward force upon the book in order to support the weight of the book.

10. Mass (F=MA)  A measure of how much matter is in an object. The basic unit of measurement for mass is the kilogram.  F=MA – Force equals Mass x Acceleration

11. Momentum  The product of an object’s mass and velocity.  Momentum = Mass x Velocity  https://www.youtube.com/watch?v=y 2Gb4NIv0Xg https://www.youtube.com/watch?v=y 2Gb4NIv0Xg

12. Law of Conservation of Momentum  The rule that in the absence of outside forces, the total momentum of objects that interact does not change.  The amount of momentum is the same before and after interaction.

13. T.O.T.D.  If an object’s momentum depends on velocity and mass, explain the following:  If both dogs have the same velocity, which one has the greater momentum? Dog 1Dog 2

14. TOTD Part 2  According to Newton’s Third Law, how are action and reaction forces related?

15. TOTD Part 3  Explain what would happen, using Newton’s Law, if you tried to catch a ball while wearing roller skates.