Wednesday-Thursday Physics 11-14-15 Questions on Projectile project Test and Review Sheet More...
-
Upload
jayson-hamilton -
Category
Documents
-
view
213 -
download
0
Transcript of Wednesday-Thursday Physics 11-14-15 Questions on Projectile project Test and Review Sheet More...
Wednesday-Thursday Physics11-14-15
Questions on Projectile project
Test and Review Sheet
More general 2 dimensional motion
Project Write up is due Tomorrow, 11-15
Typed (neat)
Complete
Show all work
There will be a test on Projectile Motion
Next Tuesday (11/20)All 3 types of projectile problems
Overall velocity valuesTrigonometry
Maximum height prolems
Homework handoutpre-review problems
Answers to homework will be up on net by Friday
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
The description for force and motion values get more
complicated (longer)
Description
Boy is walking 25 meters in the North East Direction
Displacement value is =
25m [NE] or 25m (45°)
2D values
• Always written in the formMagnitude, 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)
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)
Coming up with the direction
Started with the south direction
Moving towards the east direction
34°
[S 34 E]
Polar Coordinates
• Angle is from 0 to 360 degrees
• 0 and 360° point due east (to the right)
• Measured going counterclockwise
Problems
Angle Descriptors:
[W 75 S]
[ S 15 W]
(255°)60°
75°Angle descriptors:
[W 60 N]
[N 30 E]
(120°)
Problem
• Describe the direction of the following vector.
13°
Answer
• [ E 13 S]
• [S 77 E]
• (347°)
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/s2 ( 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