1. Wednesday-Thursday Physics 11-14-15 Questions on Projectile project Test and Review Sheet More general 2 dimensional motion

3. Project Write up is due Tomorrow, 11-15 Typed (neat) Complete Show all work

4. There will be a test on Projectile Motion Next Tuesday (11/20) All 3 types of projectile problems Overall velocity values Trigonometry Maximum height prolems

5. Homework handout pre-review problems

6. Answers to homework will be up on net by Friday

7. 2 Dimensional Motion, Forces Combining displacements or forces in 2 dimensions is not as straightforward as we have previously done –Not just simple addition or subtraction The direction for motion in 2 dimensions cannot be described by a simple plus or minus

8. The description for force and motion values get more complicated (longer)

9. Description Boy is walking 25 meters in the North East Direction Displacement value is = 25m [NE] or 25m (45°)

10. 2D values Always written in the form Magnitude, direction Several ways to write the direction [ ] use some combination of North, South, East West and the angle of direction A single angle measured from the horizontal axis pointing right (Polar coordinates)

11. Direction using N,S,W,and E Use brackets First letter is the cardinal direction line used as the start of the measurement of the angle Number the value of the angle measured Last letter is the cardinal direction towards which you measure (never on the same dimension)

12. Coming up with the direction Started with the south direction Moving towards the east direction 34° [S 34 E]

13. Polar Coordinates Angle is from 0 to 360 degrees 0 and 360° point due east (to the right) Measured going counterclockwise

14. Problems Angle Descriptors: [W 75 S] [ S 15 W] (255°) 60° 75° Angle descriptors: [W 60 N] [N 30 E] (120°)

15. Problem Describe the direction of the following vector. 13°

16. Answer [ E 13 S] [S 77 E] (347°)

17. Homework Draw a picture for each vector shown: 1)25 m [N 37 W] 2)14.3 m/s (197°) 3)7.45 N [ SE ] 4)890 m/s 2 ( 342°) 5)76.5 N [ E 49.7 S] 6)9.34 m [ S 6.0 W ] Write the direction value for each vector shown: 9.6° 7) 27° 8) 19 N 57.5 m 65° 9) 48 m/s