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Adah Tripathi
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Asked: 2020-10-27T04:36:43+00:00 In:

A train starting from a railway station and moving with uniform acceleration attains a speed 40 km h–1 in 10 minutes. Find its acceleration.

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NCERT Solutions for Class 9 Science Chapter 8
Motion
NCERT Books for Session 2022-2023
CBSE Board and UP Board
Intext Questions
Page No-103
Questions No-3

2020-2021cbsechapter 8class9motionncertscience
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    1 Answer

    1. Here we have,
      Initial velocity, u = 0 m/s
      Final velocity, v = 40 km/h = 40×1000/3600 ms⁻¹=100/9 ms⁻¹
      Time (t) = 10 minute = 60 × 10 = 600 s
      Acceleration (a) =?
      We know that, v = u + at
      ⇒𝑎=𝑣−𝑢/𝑡=(100/9−0)600=1/54=0.0185 ms⁻²
      ⇒ a = 0.0185 ms⁻²

      For more answers visit to website:
      https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-8/

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