physics

a vehicle is accelerating on a straight road. Its velocity at any instant is 30 km/hr, after 2 s, it is 33.6 km/hr and after further 2 s, it is 37.2 km/hr. Find the acceleration of vehicle in m/s^2

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asked by vicky
  1. Here,
    u1 = 30 km/h
    t = 2 s
    u2 = 33.6 km/h
    a = (u2 – u1)/t
    a1 = (33.6 – 30)/2 = 1.8 ms-2
    Similarly, a2 = (37.2 – 33.6)/2 = 1.8 ms-2
    The acceleration of the vehicle is 1.8 ms-2

    1. 👍 2
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    posted by Elena
  2. Here,
    after 2s, velocity risses with about 3.6 km/hr

    so,
    3.6/2 = 1.8 km/hr

    (1.8*1000)metre per second/(60*60)second

    =(5/10)m/s
    =0.5m/s

    1. 👍 7
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    posted by Troy
  3. Answer is 0.5m/(s*s)

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  4. Here,
    u1 = 30 km/h
    t = 2 s
    u2 = 33.6 km/h
    a = (u2 – u1)/t
    a1 = (33.6 – 30)/2 = 1.8 ms-2
    Similarly, a2 = (37.2 – 33.6)/2 = 1.8 ms-2
    The acceleration of the vehicle is 1.8 ms-2
    Here,
    after 2s, velocity risses with about 3.6 km/hr

    so,
    3.6/2 = 1.8 km/hr

    (1.8*1000)metre per second/(60*60)second

    =(5/10)m/s
    =0.5m/s
    Answer is 0.5m/(s*s)
    yes, it is
    acceleration uniform

    1. 👍 6
    2. 👎 1
    posted by TanmY
  5. You are genius ..

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  6. Answer is 0.5m/ssquare

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    2. 👎 0
  7. thank you

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