Physics 11 Force Diagrams Mr. Jean. The plan: Video clip of the day Force Diagrams Friction Friction...
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Transcript of Physics 11 Force Diagrams Mr. Jean. The plan: Video clip of the day Force Diagrams Friction Friction...
![Page 1: Physics 11 Force Diagrams Mr. Jean. The plan: Video clip of the day Force Diagrams Friction Friction Practice Questions.](https://reader036.fdocuments.in/reader036/viewer/2022062802/56649eb45503460f94bbbe08/html5/thumbnails/1.jpg)
Physics 11
Force Diagrams
Mr. Jean
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The plan:
• Video clip of the day
• Force Diagrams
• Friction
• Friction Practice Questions
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Net Forces:
• The existence of an unbalanced force for a given situation can be quickly realized by looking at the free-body diagram for that situation.
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Brightstorm Videos:
• Net Forces: http://www.brightstorm.com/science/physics/newtons-laws-of-motion/net-force-resultant-force/
• http://www.youtube.com/watch?v=AFnoBrhOR4U
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Consider the following forces:
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Consider the following:
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Solutions:
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Determine the Net Forces:
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Solutions:
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Determine the acceleration if the object had a mass of 2kg:
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Solutions:
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Practice Questions:
• P. 144– Question #5 & #6
• Upcoming items: – Rocket Design Day #1 Thursday
• Research & Introduction
– Quest Assignment #4 due next Sunday
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Rocket Design Information:
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The Engines:
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Rocket Build Goals:
• Nose Cone test
• Wing test
• Parachute Test
• Engine Size Test
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Nose Cone Test:
• A proper nose cone must fit inside the rocket fuselage.– The fit should be snug– Nose cone should detach from body when an
individual quickly blows air through the body. • Do not have your parachute in when testing this!
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Wing Test:
• In order to test the strength of the wings. A individual should be able to hold the entire rocket by one wing.– If the wing becomes unglued, falls off or
structurally fails this rocket is not suitable for flight.
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Parachute Test:
• Take a 100g weight and attach parachute to it. Drop from ceiling with parachute fully open. The parachute should guide the weight softly to the ground without horizontal displacement. – Common Failures
• Parachute lines break• Parachute causes horizontal motion• Issues with parachute design
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Engine Test Part #1:
• Engine should have a snug fit to the inside of the fuselage. – There MUST be a point where the engine can
not go past. • However there must remain hollow space to allow
the parachute deployment charge to function correctly.
– Engines are NOT to be glued into the rocket.
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Engine Test Part #2
• Engines should be secured to make sure that when deployment charge explodes it does not fire the engine out the back of the model. – Rockets MUST HAVE some type of engine
harness preventing the engine from falling out the bottom end.