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Alexandra [31]
3 years ago
5

Um avião, após deslocar-se 120 km para nordeste (NE), desloca-se 160 km para sudeste (SE). Sendo um quarto de hora o tempo total

dessa viagem, o módulo da velocidade vetorial média do avião, nesse tempo, foi de A) 320 km/h. B) 480 km/h. C) 540 km/h. D) 640 km/h. E) 800 km/h.
Physics
1 answer:
Svetach [21]3 years ago
4 0

Answer:

E) 800 km/h

Explanation:

The computation of the average vector velocity module of the plane, at that time is shown below:

The displacement vector is

d^2 = d1^2 + d2^2

where,

d1 = northeast displacement

d2 = southeast displacement

Now

d^2 = (120)^2 + (160)^2

= 14400 + 2560

= 40000

= √40000

d = 200 km

Now the average velocity is

V = ΔS ÷ Δt

= 200 ÷ 1 ÷ 4

= 200 × 4

=  800 km/h

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