a car starts from rest and acquires a velocity of 54km/h in 2 sec. find the accelaration​

Question

a car starts from rest and acquires a velocity of 54km/h in 2 sec. find the accelaration​

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Khải Quang 1 week 2021-07-22T05:06:19+00:00 2 Answers 3 views 0

Answers ( )

    0
    2021-07-22T05:07:54+00:00

    Given :-

    A car starting from rest acquires a velocity of 54km/h in 5 seconds.

    To find :-

    • Acceleration

    Solution :-

    • Initial velocity (u) = 0
    • Final velocity (v) = 54km/h
    • Time taken (t) = 2s

    → Final velocity = 54km/h

    → v = 54 × 2/18

    → v = 3 × 2

    → v = 6m/s

    According first equation of motion

    → v = u + at

    → 6 = 0 + a × (2)

    → 6 = 2a

    → a = 6/2

    a = 3 m/s²

    Hence,

    • Acceleration of car is 3m/s²

    0
    2021-07-22T05:07:57+00:00

    Answer:

    97.2m/s²

    Explanation:

    acceleration=final velocity-initial velocity/time

    a=54km/h -0 km/h/2sec

    a=194.4m/s- 0m/s/2sec

    a=194.4m/s/2sec

    a=97.2m/s²

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