Find the average acceleration of a northbound subway train that slows down from 12 m/s to 9.6 m/s in 0.8 seconds.​

Question

 Find the average acceleration of a northbound subway train that slows down from 12 m/s to 9.6 m/s in 0.8 seconds.​

in progress 0
RuslanHeatt 5 years 2021-08-18T13:17:45+00:00 1 Answers 22 views 0

Answers ( )

  1. minhkhoi
    1
    2021-08-18T13:19:19+00:00
    Reply

    Answer:

    a=-3\ m/s^2

    Explanation:

    Given that,

    Initial speed of a train, u = 12 m/s

    Final speed of a train, v = 9.6 m/s

    Time taken, t = 0.8 s

    We need to find the average acceleration of the train. We know that the rate of change of velocity is equal to acceleration. So,

    a=\dfrac{v-u}{t}\\\\a=\dfrac{9.6-12}{0.8}\\\\a=-3\ m/s^2

    So, the average acceleration of the train is equal to -3\ m/s^2.

Leave an answer

Browse

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