a seal swims rightward 3 m, but then notices a shark behind it. The seal speeds up rightward for 12 m and swims a total time 4 s

Question

a seal swims rightward 3 m, but then notices a shark behind it. The seal speeds up

rightward for 12 m and swims a total time 4 s.

3 m

12 m

What is the seal’s average velocity for the swim?

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Thái Dương 5 years 2021-07-22T02:40:10+00:00 2 Answers 24 views 0

Answers ( )

  1. Delwyn
    0
    2021-07-22T02:41:16+00:00
    Reply

    Answer:

    2.25m/s

    Explanation:

    Average velocity is the change in displacement of a bod with respect to time;

    Velocity = Δd/Δt

    velocity = d₂-d₁/Δt

    Given d₂ = 12m, d₁ = 3m and Δt = 4s

    Substitute the given value into the fromula;

    velocity = 12-3/4

    velocity = 9/4

    velocity = 2.25m/s

    Hence the seal’s average velocity for the swim is 2.25m/s

  2. thienthanh
    0
    2021-07-22T02:41:51+00:00
    Reply

    average velocity for the swim:

    3.8 m/s

    average speed for the swim:

    3.8 m/s

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