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Transcript of Please turn in your week 6 accountability sheet and pick up week 7. If you did not bring your...
![Page 1: Please turn in your week 6 accountability sheet and pick up week 7. If you did not bring your workbook, share with a table partner.](https://reader035.fdocuments.us/reader035/viewer/2022062421/56649c875503460f9493f3d1/html5/thumbnails/1.jpg)
• Please turn in your week 6 accountability sheet and pick up week 7.
• If you did not bring your workbook, share with a table partner.
![Page 2: Please turn in your week 6 accountability sheet and pick up week 7. If you did not bring your workbook, share with a table partner.](https://reader035.fdocuments.us/reader035/viewer/2022062421/56649c875503460f9493f3d1/html5/thumbnails/2.jpg)
![Page 3: Please turn in your week 6 accountability sheet and pick up week 7. If you did not bring your workbook, share with a table partner.](https://reader035.fdocuments.us/reader035/viewer/2022062421/56649c875503460f9493f3d1/html5/thumbnails/3.jpg)
REVIEW: Newton’s first law
• Sometimes referred to as the law of inertia
• “An object at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.”
![Page 4: Please turn in your week 6 accountability sheet and pick up week 7. If you did not bring your workbook, share with a table partner.](https://reader035.fdocuments.us/reader035/viewer/2022062421/56649c875503460f9493f3d1/html5/thumbnails/4.jpg)
Balanced and Unbalanced Forces• What’s that mean?
• This is equilibrium!equal magnitude, opposite direction
![Page 5: Please turn in your week 6 accountability sheet and pick up week 7. If you did not bring your workbook, share with a table partner.](https://reader035.fdocuments.us/reader035/viewer/2022062421/56649c875503460f9493f3d1/html5/thumbnails/5.jpg)
• Now consider a book being pushed to your right…
• Unbalanced forces cause Accelerations
These pics are called Free Body Diagrams
![Page 6: Please turn in your week 6 accountability sheet and pick up week 7. If you did not bring your workbook, share with a table partner.](https://reader035.fdocuments.us/reader035/viewer/2022062421/56649c875503460f9493f3d1/html5/thumbnails/6.jpg)
Drawing Free-Body Diagrams
• “diagrams used to show the relative magnitude and direction of all forces acting upon an object in a given situation”
• Use vector arrows
• Example:
![Page 7: Please turn in your week 6 accountability sheet and pick up week 7. If you did not bring your workbook, share with a table partner.](https://reader035.fdocuments.us/reader035/viewer/2022062421/56649c875503460f9493f3d1/html5/thumbnails/7.jpg)
Our first free body diagram
• A book is at rest on a tabletop
![Page 8: Please turn in your week 6 accountability sheet and pick up week 7. If you did not bring your workbook, share with a table partner.](https://reader035.fdocuments.us/reader035/viewer/2022062421/56649c875503460f9493f3d1/html5/thumbnails/8.jpg)
• A gymnast is suspended motionless from the ceiling by two ropes. Diagram the forces acting on the gymnast.
![Page 9: Please turn in your week 6 accountability sheet and pick up week 7. If you did not bring your workbook, share with a table partner.](https://reader035.fdocuments.us/reader035/viewer/2022062421/56649c875503460f9493f3d1/html5/thumbnails/9.jpg)
• An egg is free-falling from a nest in a tree. Neglect air resistance. Diagram the forces acting on the egg as it is falling
![Page 10: Please turn in your week 6 accountability sheet and pick up week 7. If you did not bring your workbook, share with a table partner.](https://reader035.fdocuments.us/reader035/viewer/2022062421/56649c875503460f9493f3d1/html5/thumbnails/10.jpg)
• A flying squirrel is gliding (no wing flaps) from a tree to the ground at constant velocity. Consider air resistance. Diagram the forces acting on the squirrel
![Page 11: Please turn in your week 6 accountability sheet and pick up week 7. If you did not bring your workbook, share with a table partner.](https://reader035.fdocuments.us/reader035/viewer/2022062421/56649c875503460f9493f3d1/html5/thumbnails/11.jpg)
• A rightward force is applied to a book in order to move it across a desk with a rightward acceleration. Consider frictional forces. Neglect air resistance. Diagram the forces acting on the book.
![Page 12: Please turn in your week 6 accountability sheet and pick up week 7. If you did not bring your workbook, share with a table partner.](https://reader035.fdocuments.us/reader035/viewer/2022062421/56649c875503460f9493f3d1/html5/thumbnails/12.jpg)
• A rightward force is applied to a book in order to move it across a desk at constant velocity. Consider frictional forces. Neglect air resistance. Diagram the forces acting on the book.
![Page 13: Please turn in your week 6 accountability sheet and pick up week 7. If you did not bring your workbook, share with a table partner.](https://reader035.fdocuments.us/reader035/viewer/2022062421/56649c875503460f9493f3d1/html5/thumbnails/13.jpg)
• A college student rests a backpack upon his shoulder. The pack is suspended motionless by one strap from one shoulder. Diagram the vertical forces acting on the backpack.
![Page 14: Please turn in your week 6 accountability sheet and pick up week 7. If you did not bring your workbook, share with a table partner.](https://reader035.fdocuments.us/reader035/viewer/2022062421/56649c875503460f9493f3d1/html5/thumbnails/14.jpg)
• A skydiver is descending with a constant velocity. Consider air resistance. Diagram the forces acting upon the skydiver.
![Page 15: Please turn in your week 6 accountability sheet and pick up week 7. If you did not bring your workbook, share with a table partner.](https://reader035.fdocuments.us/reader035/viewer/2022062421/56649c875503460f9493f3d1/html5/thumbnails/15.jpg)
• A force is applied to the right to drag a sled across loosely packed snow with a rightward acceleration. Diagram the forces acting upon the sled.
![Page 16: Please turn in your week 6 accountability sheet and pick up week 7. If you did not bring your workbook, share with a table partner.](https://reader035.fdocuments.us/reader035/viewer/2022062421/56649c875503460f9493f3d1/html5/thumbnails/16.jpg)
• A car is coasting to the right and slowing down. Diagram the forces acting upon the car.
![Page 17: Please turn in your week 6 accountability sheet and pick up week 7. If you did not bring your workbook, share with a table partner.](https://reader035.fdocuments.us/reader035/viewer/2022062421/56649c875503460f9493f3d1/html5/thumbnails/17.jpg)
Determining the Net Force
• A. B. C.
• net force is the vector sum of all the forces that act upon an object (“Where is the imbalance?”)
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• Figuring out the net force: Ask yourself these questions: In what direction and of what magnitude is the imbalance?
![Page 19: Please turn in your week 6 accountability sheet and pick up week 7. If you did not bring your workbook, share with a table partner.](https://reader035.fdocuments.us/reader035/viewer/2022062421/56649c875503460f9493f3d1/html5/thumbnails/19.jpg)
Determine the net force acting upon the object
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The net force is known for each situation. However, the magnitudes of a few of the individual forces are not known. Analyze each situation individually
and determine the magnitude of the unknown forces.
![Page 21: Please turn in your week 6 accountability sheet and pick up week 7. If you did not bring your workbook, share with a table partner.](https://reader035.fdocuments.us/reader035/viewer/2022062421/56649c875503460f9493f3d1/html5/thumbnails/21.jpg)