1. Physics Projectile Motion What happens to an object when it has combined horizontal and vertical motion?

2. Reach out an touch someone at 30 to 40 km range (18-24 miles).

3. What is a Projectile Any object which is in motion that is subject to the effects of gravitational acceleration, g. Typically such an object is thrown or launched. Examples:Football, Rock, Basketball, People.

4. Turn Your Attention To The Rear

5. Vertical and Horizontal Motion When vertical and horizontal motion combine an object will travel along a curved path. This path follows the general shape of a parabola. It is called a ballistic arc.

7. Horizontal Component As we saw with the cart, it moved at a constant velocity in the horizontal. This is called the “Inertial Component.” (More about inertia at a later date). We label it on the picture diagram as v x

9. Vertical Component The vertical component is subject to Earth’s gravity, g. As such the object goes faster the longer and/or farther it falls. This is called the gravitational component and we label on the diagram as v y.

10. Adding The Two Motions

11. But Why Does It Curve? The Horizontal & Vertical Are Independent Of Each Other!!!

13. Notice Anything? The x and y components add to create the objects total velocity. (Note that v x doesn’t change).

14. If They Add To Form The Motion.. Then a velocity applied at an angle can be broken apart into two pieces, v x and v y. 100 m/s 30° 86 m/s 50 m/s

16. Once The Launch Vector Is In Two Pieces ….. We can figure out range of the projectile. Height that it will fly. How long it will be airborne. HANG TIME IS THE KEY TO PROJECTILE MOTION PROBLEMS!!!!!!!

17. Handy Websites This lecture is taken from the website for your text. http://www.physicsclassroom.com/Class/vectors/U3L2a.html http://www.physicsclassroom.com/Class/vectors/U3L2a.html I also recommend…. http://www.phschool.com/science/cpsurf/mechanics/1 _3lear.html http://www.phschool.com/science/cpsurf/mechanics/1 _3lear.html http://lectureonline.cl.msu.edu/~mmp/kap3/cd0 60.htm http://lectureonline.cl.msu.edu/~mmp/kap3/cd0 60.htm