Transcript Motion
1 Motion * Why do all objects “seem” to fall at the same rate? * What is the relationship between force and motion? * Why do like really big slow moving ships run into like really big stationary continents????? 2 Motion Vis Insita Power of Resting 3 4 Motion Vis Insita …vis insita, …may…be called inertia Isaac Newton From the Latin word meaning “idleness” or “laziness” 5 Motion Fundamental Quantity – Mass 6 Motion Fundamental Quantity – Mass The amount of stuff in an object 7 Motion Fundamental Quantity – Mass The amount of stuff in an object Mass is a measure of inertia. 8 Motion Fundamental Quantity – Mass The amount of stuff in an object Mass is a measure of inertia. * “High” mass → “High” inertia 9 Motion Fundamental Quantity – Mass The amount of stuff in an object Mass is a measure of inertia. * “High” mass → “High” inertia * “High” mass → “Harder” to change motion 10 Motion – Newton’s Laws 1. Every body continues in its state of rest or uniform motion unless it is acted upon by a net external force. 11 b 12 13 Motion – Newton’s Laws Case Study: Houston, we have a problem.. A malfunction in Apollo 13 caused gasses to vent into space and then crystallize. Even though the crystals had left the spacecraft, they continued to move along next to the capsule. The navigation system used stars as “finders” to maintain course, but with all the crystals surrounding the capsule, the navigation system was not able to distinguish a star from a crystal. Why did these crystals stay with the spacecraft, rather that “drift away” once they were no longer confined? 14 Motion – Newton’s Laws Case Study: Once a captain realizes that the ship is dangerously close to a land mass and is going to collide, why doesn’t the captain simply TURN THE STEERING WHEEL? 15 Motion – Newton’s Laws Case Study: A “strong Man” attempts to pull the aircraft shown. In doing so, he initiates the motion by gradually pulling. Why doesn’t he get a running start so he uses his motion to create a harder initial pull on the plane to get it going? 16