Physics

A car traveling 60km/hr accelerates at the rate of 2.0m/s2. How much time is required for the car to reach a speed of 90km/hr?

can u help me with this? With solutions

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  1. V = Vo + a*t.
    Vo = 60,000m/3600s = 16.7 m/s.
    V = 90,000/3600s. = 25 m/s.
    t = ?.

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  2. V = Vo + a*t.
    Vo = 60,000m/3600s = 16.7 m/s.
    V = 90,000/3600s. = 25 m/s.
    t =
    a=(v-u)/t
    2=(25-16.7)/t
    2=(8.30)/t
    t=(8.3/2)
    t=4.15

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  3. it can be rounded off to 4.2

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