Motion in 2D Chapter 6. 6.1 Projectile Motion Projectile – object shot, launched, kicked, thrown,...
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Transcript of Motion in 2D Chapter 6. 6.1 Projectile Motion Projectile – object shot, launched, kicked, thrown,...
![Page 1: Motion in 2D Chapter 6. 6.1 Projectile Motion Projectile – object shot, launched, kicked, thrown, etc through the air Path is up then down in curve –Called.](https://reader036.fdocuments.net/reader036/viewer/2022071808/56649ee65503460f94bf7276/html5/thumbnails/1.jpg)
Motion in 2DChapter 6
![Page 2: Motion in 2D Chapter 6. 6.1 Projectile Motion Projectile – object shot, launched, kicked, thrown, etc through the air Path is up then down in curve –Called.](https://reader036.fdocuments.net/reader036/viewer/2022071808/56649ee65503460f94bf7276/html5/thumbnails/2.jpg)
6.1 Projectile Motion• Projectile – object shot, launched, kicked,
thrown, etc through the air• Path is up then down in curve
– Called trajectory• Forces?
– Force of earth and air resistance– Initial force causing motion
• When known, can calculate trajectory
![Page 3: Motion in 2D Chapter 6. 6.1 Projectile Motion Projectile – object shot, launched, kicked, thrown, etc through the air Path is up then down in curve –Called.](https://reader036.fdocuments.net/reader036/viewer/2022071808/56649ee65503460f94bf7276/html5/thumbnails/3.jpg)
Independence of Motion in 2D• Objects fall at the same
rate– Dropped compared to
launched (vertically)– Myth Busters clip
• Can separate motion– Motion in x-direction and
motion in y-direction– Independent of each other
![Page 4: Motion in 2D Chapter 6. 6.1 Projectile Motion Projectile – object shot, launched, kicked, thrown, etc through the air Path is up then down in curve –Called.](https://reader036.fdocuments.net/reader036/viewer/2022071808/56649ee65503460f94bf7276/html5/thumbnails/4.jpg)
Launched at Angle• Symmetric
• Range
• Flight time or Hang time
![Page 5: Motion in 2D Chapter 6. 6.1 Projectile Motion Projectile – object shot, launched, kicked, thrown, etc through the air Path is up then down in curve –Called.](https://reader036.fdocuments.net/reader036/viewer/2022071808/56649ee65503460f94bf7276/html5/thumbnails/5.jpg)
6.2 Circular Motion• Change in direction
leads to acceleration
• Uniform Circular Motion– Constant speed around
circle with fixed radius– Position vector length
doesn’t change
![Page 6: Motion in 2D Chapter 6. 6.1 Projectile Motion Projectile – object shot, launched, kicked, thrown, etc through the air Path is up then down in curve –Called.](https://reader036.fdocuments.net/reader036/viewer/2022071808/56649ee65503460f94bf7276/html5/thumbnails/6.jpg)
Centripetal Acceleration• Velocity direction
changes, but length is constant– Tangential to circle
• Acceleration points in same direction as velocity change
• Centripetal means center seeking
![Page 7: Motion in 2D Chapter 6. 6.1 Projectile Motion Projectile – object shot, launched, kicked, thrown, etc through the air Path is up then down in curve –Called.](https://reader036.fdocuments.net/reader036/viewer/2022071808/56649ee65503460f94bf7276/html5/thumbnails/7.jpg)
Centripetal Acceleration• Pg 154 - derivation
• Period – time needed for object to make a complete revolution
• Newton’s Second form – Net force always points toward center of circle– Net centripetal force
![Page 8: Motion in 2D Chapter 6. 6.1 Projectile Motion Projectile – object shot, launched, kicked, thrown, etc through the air Path is up then down in curve –Called.](https://reader036.fdocuments.net/reader036/viewer/2022071808/56649ee65503460f94bf7276/html5/thumbnails/8.jpg)
“Centrifugal Force”• Centrifugal – outward force
– Nonexistent– Fictitious– Actually inertia described by Newton’s 1st Law
![Page 9: Motion in 2D Chapter 6. 6.1 Projectile Motion Projectile – object shot, launched, kicked, thrown, etc through the air Path is up then down in curve –Called.](https://reader036.fdocuments.net/reader036/viewer/2022071808/56649ee65503460f94bf7276/html5/thumbnails/9.jpg)
6.3 Relative Velocity• Albert Einstein and his Theory of Relativity
• Motion relative to a moving object and seen by stationary observer– Vice versa
![Page 10: Motion in 2D Chapter 6. 6.1 Projectile Motion Projectile – object shot, launched, kicked, thrown, etc through the air Path is up then down in curve –Called.](https://reader036.fdocuments.net/reader036/viewer/2022071808/56649ee65503460f94bf7276/html5/thumbnails/10.jpg)
Lab• Catapult lab
– http://teachingphysics.wordpress.com/2009/03/01/projectile-motion-activity/