2. (PUC-Rio - RJ) Um veleiro deixa o porto nave-
gando 70 km em direção leste. Em seguida,
pa...
2. (PUC-Rio - RJ) Um veleiro deixa o porto nave-
gando 70 km em direção leste. Em seguida,
para atingir seu destino, navega mais 32 km
na direção nordeste, formando 60° com a dire-
ção inicial. Desprezando a curvatura da Terra e
admitindo
que todos os deslocamentos são co-
planares, determine aproximadamente o deslo-
camento total do veleiro em relação ao porto
de origem.
(Considere cos 60º = 1/2)
a) 106 km b) 90 km c) 154 km
d) 284 km e) 217 km
Answers: 1
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