Ejercicios de capitulo 1 - Fisica 1
Unidad II Vectores
1mi 1.609km
1 mi
1.609km
1.609km
1 mi
1km 1000m
1km
1m 100cm
1 ft 30.48cm
1000 m 100cm 1 ft
3280 ft
1km
1 m 30.48cm
0.473 l
1000ml
473ml 473cm3
1l
3
1in
2
473cm 3
32.16in
2.54cm
v
d
t
t
d
v
d 1 ft 30.48cm 0.3048m
v c 3x108 m
t
s
0.3048m
1.02 x109 s 1.02ns
3x108 m
s
1 kg
m3
11,3 g
1000 gcm3
cm3
x1000 11300 kg
m3
1
A 100m 100m 10000m 2 1ha
43600 ft 2
523200 ft 2
1acre
12acres
48606.8m2
1ha
4.86ha
10000m 2
1mil millones 1x109 s
60
32
2
0.3048m
2
523200 ft 2
48606.8m
1
ft
1 h 1día 1año
31.7años
3600 s 24h 365días
mi 5280 ft
1h
87.17 ft
s
h
1 mi
3600s
ft 0.3048m
9.75 m 2
s
1 ft
s2
Incertidumbre y Cifras Significativas%error
0.010km
100 1.1x103%
890km
2
A 12mm 5.98mm 72mm 2
ancho 5.98mm
0.50
largo
12mm
(2 cifras)
(2 cifras)
Perimetro 12mm 5.98mm 12mm 5.98mm 36mm
longitud-ancho 12mm 5.98mm 6mm
(sin decimales)
(sin decimales)
Vectores
A=2.6 ˪90°
B=4 ˪0°
C=3.1 ˪45°
D=A+B+C = 7.83 ˪38°
3
1.32
A=8 ˪-90°
B=15 ˪60°
A+B=9 ˪33.6°
A-B=22.3 ˪-109.7°
B-A=22.3 ˪70.3°1.33
9.3 ˪60°→
x=4.65
y=8.05
22 ˪135°→
x=-15.6
y=15.6
6.35 ˪307°→
x=3.82
y=-5.07
4
A=8m ˪-90°→
x=0
y=-8
B=15m ˪60°→
x=7.5
y=13
C=12m ˪205°→
x=-10.9
y=-5.07
D=10m ˪143°→
x=-8
y=6
x=2
y=-1
A=2.23 ˪-26.56°
x=2
y=1
A=2.23 ˪26.56°
x=-2
y=1
A=2.23 ˪153.43°
x=-2
y=-1
A=2.23 ˪-153.43°
F1=725 ˪0°
A=2.6 ˪90°
F2=513 ˪32.4°
B=4 ˪0°
C=3.1 ˪45°
FT= F1 +F2 =1190 ˪13.4°D=A+B+C = 7.83 ˪37.73°
x=-8.6
y=5.2
A= 10˪148.8°
x=-9.7
y=-2.45
A=10 ˪-165.8°
x=7.75
y=-2.7
A= 8.2˪-19.2°
5
A= 3.25˪90°
B= 4.75˪180°
C= 1.5˪270°
D=A+B+C = 5 ˪159.8°
A=(1.3x , 2.25y) B=(4.1x ,-3.75y)
A+B=(5.4x ,-1.5y)
A+B=5.6 ˪-15.5°
1.43
1.44
A=2.8cm ˪60° B=1.9cm ˪-60°
A+B=2.47 ˪18°
A-B=4 ˪84°
B-A=4˪-96°
A=5 ˪0°
B=7 ˪180°
A+B=2 ˪180°
6
A=625 ˪-90°
1.55
B=875 ˪30°A+B=C=780.6 ˪-13.9
R/ -C=780.6 ˪166.1
A=8m ˪-90°→
x=0
y=-8
→
(0i, -8j, 0k)
B=15m ˪60°→
x=7.5
y=13
→
(7.5i, 13j, 0k)
C=12m ˪205°→
x=-10.9
y=-5.07
→
(-10.9i, -5.07j, 0k)
D=10m ˪143°→
x=-8
y=6
→
(-8i, 6j, 0k)
Producto punto
A=-2i +6j
|A|=6.32
|B=2i -3j
|B|=3.6
A B ( Ax Bx Ay By Az Bz ) AB cos
A B (2 2 6 3 0 0) 22 (6.32)(3.6) cos
cos
1
22
0.96cos 165
22.75
A=3i +5j
|A|=5.83
B=10i + 6j
|B|=11.66
B=7i + 14j
|B|=15.65
A B 60 (5.83)(11.66) cos
cos
1
60
0.882cos 28
68
A=-4i +2j
|A|=4.47
A B 0 (4.47)(15.65) cos
cos
1
0
0cos 90
70
7
i
A B Ax
Bx
j
Ay
By
k
Az ( Ay Bz By Az )i ( Ax Bz Bx Az ) j ( Ax By Bx Ay )k
Bz
A=8m ˪-90°→
x=0
y=-8
→
(0i,-8j, 0k)
D=10m ˪143°→
x=-8
y=6
→
(-8i, 6j, 0k)
A=2.8m ˪60°→
x=1.4
y=2.4
→
(1.4i, 2.4j, 0k)
B=1.9m ˪-60°→
x=0.95
y=-1.64
→
(0.95i,- 1.64j, 0k)
AxB =(0i, 0j, -4.6k)
x=0
y=0
z=-4.6
BxA =(0i, 0j, 4.6k)
x=0
y=0
z=4.6
AxD =(0i, 0j, -64k)
DxA = (0i, 0j, 64k)
Problemas
Pasar kg/m3 a g/cm3 dividiendo entre 1000, Si Densidad=masa/Volumen entonces V=m/D
m 200 g
D 7.86 g
cm3
m 25.44cm3
D
Vcubo L3
L 2.94cm3
V
4
Vesfera r 3
3
r 1.82cm3
8
1.68
A=100 ˪30°
B=80 ˪120°
C=40 ˪233°
B=6.4 ˪-63°
C=6.4 ˪22°
Si C=A+B
A=2 ˪0°
B=3.5 ˪-45°
C?
D=A+B+C=90.2 ˪75.5° R/ -D=90.2 ˪255.5°
entonces
D=5.8 ˪0°
A=C-B=8.6 ˪69.5°
si D=A+B+C
entonces C=D-A-B
C=2.8 ˪61.8°
9
1.76
A=147 ˪5°
B=106 ˪13°
C=166 ˪145°
D=A+B+C=174km ˪49.22°
A=285 ˪140°
B?
C=115˪0°
Si C=A+B
entonces B=C-A= 380 ˪-28.8°
A x2 y 2 z 2
A 2i 3 j 4k A 5.38
B 3i 1 j 3k B 4.36
A B 5i 2 j 7k A B 8.83
Producto cruz
A=3
B=3
AxB=(2i, 0j, -5k)→
|AxB|=5.38
AxB=ABsenθ
5.38=(3)(3)senθ
senθ=0.5977
θ=36.7°
10
Un auto realiza los siguientes desplazamientos:
a) 300m al este.
b) 400m al E 20 N.
c) 200m al N
¿Cuál es la magnitud y...
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