b) Distancia recorrida: 30 + 20 + 13 =
63 m
Desplazamiento
= 23.4 m
c) Distancia recorrida: 250 + 450 + 150 + 100 =
950 m
Desplazamiento
= 283 m
d)
x
= (350)(cos30
) + (300)(cos23
)
–
(250)(cos35
)
–
(400)(cos25
)
x
= 303.11 + 276.15
–
204.79
–
362.53
x
= 11.95
y
= (350)(sen30
) + (400)(sen25
)
–
(300)(sen23
)
–
(250)(sen35
)
y
= 175 + 169.05
–
117.22
–
143.39
y
= 83.44
R =
√ ²³´µ
¶
·¸ ¹º²´´µ
¶
=
»¼ ½´²¼³
=
84.29 N
= tan
-1
(
²³³
´´²µ³
)
= 81.85
180
–
81.85 =
98.15
Apéndice
233