Bhuv Gupta
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A bus starting from rest moves with a uniform acceleration of 0.1 m s-2 for 2 minutes.

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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-109
Questions No-1

A bus starting from rest moves with a uniform acceleration of 0.1 m s-2 for 2 minutes. Find

 (a) the speed acquired

 (b) the distance travelled.

 

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1 Answer

  1. Here we have,
    Initial velocity (u) = 0 m/s
    Acceleration (a) = 0.1ms⁻²
    Time (t) = 2 minute = 120 seconds
    (a) The speed acquired:
    We know that, v = u + at
    ⇒ v = 0 + 0.1 × 120 m/s
    ⇒ v = 12 m/s
    Thus, the bus will acquire a speed of 12 m/s after 2 minute with the given acceleration.
    (b) The distance travelled
    We know that, s = ut + 1/2at²
    = 0 × 120 + 1/2 × 0.1 × (120) ²
    = 1/2 × 0.1 ×14400 m = 720 m
    Thus, bus will travel a distance of 720 m in the given time of 2 minute.

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

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