1. Can moving objects be in equilibrium?

2. EQUILIBRIUM We have seen that objects in Physics fall into two categories: those that are in equilibrium, and those that are not in equilibrium.

3. EQUILIBRIUM We have seen that objects in Physics fall into two categories: those that are in equilibrium, and those that are not in equilibrium; We have seen that objects will remain in equilibrium in the absence of a (Physics) agent;

4. EQUILIBRIUM We have seen that objects in Physics fall into two categories: those that are in equilibrium, and those that are not in equilibrium; We have seen that objects will remain in equilibrium in the absence of a (Physics) agent; Objects will be out of balance during the time the agent is acting on it.

5. EQUILIBRIUM In equilibrium No outside agent Motion is due to INERTIA Out of equilibrium Outside agent Motion is due to IMPULSE

6. ONCE UPON A TIME… …scientists believed that all objects in motion where being acted upon by an agent. They called this agent “impetus”: IMPETUSMOTION

7. GALILEO GALILEI He presented a logic “thought experiment” to prove that objects can move without an agent present. He concluded from his experiments that objects moving at a constant velocity (speed + a direction) are also in equilibrium. MOTION @ CONSTANTUNIFORM VELOCITY MOTION

8. GALILEO GALILEI MOTION @ CONSTANTUNIFORM VELOCITY MOTION AND UNIFORMBALANCED MOTION STATE

9. The Second Simplest State Identifier(s) Object in constant velocity. Physics Concept(s) DYNAMIC EQUILIBRIUM

10. The Second Simplest State Identifier(s) Object in constant velocity. Motion Type: UNIFORM Physics Concept(s) DYNAMIC EQUILIBRIUM in MOTION

11. The Second Simplest State Identifier(s) Object in constant velocity. Motion Type: UNIFORM 2 types Physics Concept(s) DYNAMIC EQUILIBRIUM in MOTION

12. The Second Simplest State Identifier(s) Object in constant velocity. Motion Type: UNIFORM 2 types Physics Concept(s) DYNAMIC EQUILIBRIUM in MOTION Rotational (object rotates)

13. The Second Simplest State Identifier(s) Object in constant velocity. Motion Type: UNIFORM 2 types Physics Concept(s) DYNAMIC EQUILIBRIUM in MOTION Rotational (object rotates) Translational (motion on a line)

14. INERTIA Ability for an object to sustain its state of equilibrium indefinitely. For objects in UNIFORM MOTION, the measure of the object’s inertia is the object’s MOMENTUM. PHYSICS CONCEPTMEASURE “MOVING” INERTIA MOMENTUM

15. MOMENTUM 2 types (ROTATIONAL and TRANSLATIONAL) ROTATIONAL is called ANGULAR MOMENTUM TRANSLATIONAL is called LINEAR MOMENTUM

16. LINEAR MOMENTUM To find the amount of an object’s linear momentum, multiply its mass by its speed. Momentum = mass X speed