Summary
- Describing motion
- Kinematic equations
- Free falling objects
Chapter 3
- Coordinate systems
- Vectors
pse6 3.2
Two points have polar coordinates (2.5, 30°) and (3.8, 120°). What is the distance between them?
A. 1.30 m
B. 3.95 m
C. 4.55 m
D. 6.30 m
Answer
PoP5 1.36
A plane flies 280 km at 20° north of east and then 190 km at 30° west of north.
Now how far is it from its starting point?
A. 168 km
B. 190 km
C. 260 km
D. 310 km
Answer
pse6 3.10
Vector A has length 8 at 45° from the +x axis, and B has length 8 along the
−x axis. What is A−B?
A. 14.8 at 22.5°
B. 16.0 at 22.5°
C. 6.12 at 112.5°
D. zero
Answer
pop5 1.38
If
and
, what is the magnitude of
?
A. 6.40
B. 8.06
C. 9.79
D. 11.2
Answer
pop5 1.39
Taking
units,
units, and
units, determine a and
b such that 
A. a = 3, b = −4
B. a = 5, b = 7
C. a = −2, b = −5
D. a = −4, b = 2
Answer
answer
C. 4.55 m
answer
D. 310 km
answer
A. 14.8 at 22.5°
answer
B. 8.06
answer
B. a = 5, b = 7
Example #3