Three displacements are A → = 200 m due south, B → = 250 m due west, and C → = 150 m at 30.0° east of north. (a) Construct a separate diagram for each of the following possible ways of adding these vectors: R → 1 = A → + B → + C → ; R → 2 = B → + C → + A → ; R → 3 = C → + B → + A → . (b) Explain what you can conclude from comparing the diagrams.
Three displacements are A → = 200 m due south, B → = 250 m due west, and C → = 150 m at 30.0° east of north. (a) Construct a separate diagram for each of the following possible ways of adding these vectors: R → 1 = A → + B → + C → ; R → 2 = B → + C → + A → ; R → 3 = C → + B → + A → . (b) Explain what you can conclude from comparing the diagrams.
Solution Summary: The author explains graphical method or geographical construction of vectors as a method that is used to add more than two.
Three displacements are
A
→
=
200
m
due south,
B
→
=
250
m
due west, and
C
→
=
150
m
at 30.0° east of north. (a) Construct a separate diagram for each of the following possible ways of adding these vectors:
R
→
1
=
A
→
+
B
→
+
C
→
;
R
→
2
=
B
→
+
C
→
+
A
→
;
R
→
3
=
C
→
+
B
→
+
A
→
. (b) Explain what you can conclude from comparing the diagrams.
2
聯梧桐紀
PAGENIN ERA
5
7
DOG FAMILY
puppies
C01: Physical Quantities, Units and Measurements
4
A student wanted to measure the diameter of a cylindrical water bottle.
Which of the following gives the most accurate measurement?
A
B
CD
Take three measurements of the diameter using a rule before finding the
average.
Take three measurements of the diameter using a digital micrometer screw
gauge, resetting to zero before every measurement before finding the
average.
Take three measurements of the diameter using the digital calipers,
resetting to zero before every measurement before finding the average.
Take three measurements of the diameter using the digital calipers without
resetting to zero before every measurement before finding the average.
The resultant force FR acting on an object is given by, FR = ma, where m is the mass of
the object in kg and a is the acceleration of the object in m/s².
Which unit is equivalent to the unit for force?
A
B
с
D
kg ms²
kg m²s
kg m/s²
kg m²/s²
adt to…
C01: Physical Quantities, Units and Measurements
10 A student uses a rule to measure a thin piece of wire.
wire
0 1
cm
2
3
4
5
5 6 7 8
9 10 11 12 13 14
15
(a) State two errors in the student's measurement of the length of wire.
[2]
The student records the length of the wire as 12.8 cm.
[E]
The student is asked to measure the thickness of the wire using a pencil and the
same rule. Suggest how this can be done as accurately as possible.
[4]
(b) The student finds out that the density of the wire is 2.7 g/cm³. Express 2.7 g/cm³ in
kg/m³.
[2]
to V emulov or worl?
гавтоха
[E11 The length of a sheet of plastic is measured using a 15 cm rule.
eq
8
5
Imm 1
2
سيلينا
3
3
5
7
8
10
11 12
13
14
L
ins
15
sem of beiupe
stipib e elun olfastq e riliw bei
inebulz A
H
com al Jari Inemundeni or ezoori (s)
re the
sheet of plastic
Chapter 3 Solutions
Physics for Scientists and Engineers, Technology Update (No access codes included)
Human Physiology: An Integrated Approach (8th Edition)
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