A student leaves his house and walks 4 m east to friend’s house, and then turns and walks 7 m west to the library in 120 seconds. Determine

Question

A student leaves his house and walks 4 m east to friend’s house, and then turns and walks 7 m west to the library in 120 seconds. Determine the student’s average velocity for his entire walk.

in progress 0
Kim Cúc 6 months 2021-07-30T15:04:31+00:00 1 Answers 4 views 0

Answers ( )

    0
    2021-07-30T15:06:02+00:00

    Answer:

    v_average = -0.025 m / s

    the minus indicates that the velocity is to the west.

    Explanation:

    For this exercise we use the definition of average velocity

             v_average = (x₂-x₁) / Δt

    Let’s keep in mind that the velocity is a vector, so the displacement is

              x₂ – x₁ = 4 – 7 = -3

    the minus indicates that the shift is to the west.

    Let’s calculate

               v_average = -3 / 120

               v_average = -0.025 m / s

    the minus indicates that the velocity is to the west.

Leave an answer

Browse

Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )