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DAY 7 LETS GO! Lots to discuss
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FIRST OF ALL…THE OLD LAB
Take some
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Take some time…20 to 25 minutes to finish.
FIRST OF ALL…THE LAB Take some time…20 to 25 minutes to finish. Make sure your names are on the back, and that you have ALL you need on it
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AND NOW OUR FINAL EXAM Happening next week…. Wed/Thurs?
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Look at The Review And Link Real Quick
I want YOU and YOU alone to try it, and feel comfortable if you understand the ideas presented. Answer 1-3 for me, write brief explanations
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This is the original scenario we are linking to.
Think of each variable listed and how it has a direct or indirect effect on horizontal distance
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Mass of Shell: NO EFFECT! Initial Velocity: INDIRECT: CANT TELL ENOUGH Initial Vertical Velocity: INDIRECT: AFFECTS AIR TIME Initial Horizontal Velocity: DIRECT RELATIONSHIP Angle: INDIRECT: USED TO GET ABOVE
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So we just changed the mass:
Therefore….
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We changed: Which meant that….
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We changed: Which meant that….
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REMIND ME Time to vote
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We use a very specific phrase for the fact that the force sum is zero
We use a very specific phrase for the fact that the force sum is zero. Its called: (2 options) B_______________ E_______________
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His First Law of Motion If forces cause changes in motion: Then an imbalance of force on an object will change motion A balance of forces on an object is equivalent to no forces, and no change of motion occurs.
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Stuff keeps doing what its doing until it experiences an imbalance
His First Law of Motion Stuff keeps doing what its doing until it experiences an imbalance
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We care about 2 things with forces
1) Application of forces What objects are in the system How much force is applied from each Directions of each force We find the total force called the NET FORCE of the SYSTEM
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We care about 2 things with forces
2) How the net force of the system affects the objects motion How the system net force accelerates the object. No net force (IMBALANCE) is called EQUALIBRIUM
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Newtons 2nd Law An imbalance of forces in a system creates an ACCELERATION on an object in the direction of the imbalance. Equation:
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The force of A on B is equal to the force of B on A
NEWTONS THIRD LAW The force of A on B is equal to the force of B on A Example: Earth and me.
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TRUCK vs FLY EXAMPLE
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