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Earth Science Room 6-128 Mr. Becker Projectile Motion • Projectile • Any object that moves forward due to its inertia and accelerates downward due to gravity. • Projectile Motion • The curved path of a projectile. The vertical and horizontal components of the motion are independent of each other. Orbital Motion • Orbital Motion • The inertia component in the horizontal direction and gravity component in the vertical direction combine to cause the projectile to move in a continuous curved path. Exercise • Draw a sketch that shows the inertia and gravity components with lines at right angles causing the curved path of an object orbiting the Earth. Orbital Motion Sketch curved path Inertia Inertia gravity gravity Projectile Motion Orbital Motion Newton’s Laws of Motion • 1. An object at rest remains at rest and an object in motion maintains its velocity unless it experiences an unbalanced force. • 2. The unbalanced force acting on an object equals the object’s mass times its acceleration. (Force = mass x acceleration) • 3. For every action force, there is an equal and opposite reaction force. • G. All objects in the universe attract each other by the force of gravity. Newton’s Laws of Motion • • • • • • • 1. A baseball bat snaps backwards after hitting a ball. 2. A satellite orbits the earth. 3. A wagon is still until a child pushes it. 4. A bowling ball is harder to move than a baseball. 5. A leaf falls to the ground. Projectile Motion http://www.glenbrook.k12.il.us/gbssci/phys/Class/vectors/u3l2a.html Projectile Motion http://www.glenbrook.k12.il.us/gbssci/phys/Class/vectors/u3l2a.html Projectile Motion http://www.glenbrook.k12.il.us/gbssci/phys/Class/vectors/u3l2a.html Projectile Motion: Gravity? http://www.glenbrook.k12.il.us/gbssci/phys/Class/vectors/u3l2a.html http://www.glenbrook.k12.il.us/gbssci/phys/mmedia/vectors/mzng.html Projectile Motion: Gravity? http://www.glenbrook.k12.il.us/gbssci/phys/Class/vectors/u3l2a.html http://www.glenbrook.k12.il.us/gbssci/phys/mmedia/vectors/mzg.html Horizontally Launched Projectiles http://www.glenbrook.k12.il.us/gbssci/phys/mmedia/vectors/hlp.html Horizontally Launched Projectiles http://www.glenbrook.k12.il.us/gbssci/phys/mmedia/vectors/hlp.html Horizontally Launched Projectiles http://www.glenbrook.k12.il.us/gbssci/phys/mmedia/vectors/hlp.html Horizontally Launched Projectiles http://www.glenbrook.k12.il.us/gbssci/phys/mmedia/vectors/hlp.html The Plane and The Package http://www.glenbrook.k12.il.us/gbssci/phys/mmedia/vectors/pap.html The Truck and the Ball http://www.glenbrook.k12.il.us/gbssci/phys/mmedia/vectors/tb.html Non-Horizontally Launched Projectiles http://www.glenbrook.k12.il.us/gbssci/phys/mmedia/vectors/nhlp.html Non-Horizontally Launched Projectiles http://www.glenbrook.k12.il.us/gbssci/phys/mmedia/vectors/nhlp.html Non-Horizontally Launched Projectiles http://www.glenbrook.k12.il.us/gbssci/phys/mmedia/vectors/nhlp.html Non-Horizontally Launched Projectiles http://www.glenbrook.k12.il.us/gbssci/phys/mmedia/vectors/nhlp.html Orbital Motion Orbital Motion Orbital Motion • Credits: Use the following link: • http://www.glenbrook.k12.il.us/gbssci/phys /mmedia/vectors/sat.html Projectile to Orbital Motion http://www.glenbrook.k12.il.us/gbssci/phys/mmedia/vectors/sat.html Projectile to Orbital Motion http://www.glenbrook.k12.il.us/gbssci/phys/mmedia/vectors/sat.html 8000 m/s required for orbit http://www.glenbrook.k12.il.us/gbssci/phys/mmedia/vectors/sat.html 8000 m/s required for orbit http://www.glenbrook.k12.il.us/gbssci/phys/mmedia/vectors/sat.html 8000 m/s required for orbit http://www.glenbrook.k12.il.us/gbssci/phys/mmedia/vectors/sat.html Kepler’s Second Law Animation • http://rt210.sl.psu.edu/phys_anim/astro/ke pler_2_avi.html Simulations Simulations: Projectile & Orbital • • Cannon http://jersey.uoregon.edu/vlab/Cannon/ • • Projectile Motion Simulator http://www.mnstate.edu/lindaas/phys200/Lab/Sims/projectile.swf • • Projectile Orbits and Satellite Orbits http://physci.kennesaw.edu/javamirror/ntnujava/projectileOrbit/projectileOrbi t.html • • Planetary Motion http://galileoandeinstein.physics.virginia.edu/more_stuff/flashlets/kepler6.ht m • • The Orbit Applet http://www.astro.queensu.ca/~musgrave/cforce/OrbitApplet.html Links: Walter Fendt • Projectile Motion • http://www.walter-fendt.de/ph14e/projectile.htm • Kepler’s First Law • http://www.walter-fendt.de/ph14e/keplerlaw1.htm • Kepler’s Second Law • http://www.walter-fendt.de/ph14e/keplerlaw2.htm • Uniform Circular Motion • http://www.walter-fendt.de/ph14e/circmotion.htm Simulations • • • • Open Internet Explorer. Type and Enter: earthsciencenhs.wikispaces.com Choose Projectile Orbital Simulations.