science
Grade-9
Easy

Question

A car starts from rest and keeps increasing its speed by 3 m/s every second. The final speed that it reaches after 20 seconds is _____.

hintHint:

60 m/s

The correct answer is: 60


    Given that,
    The initial velocity, u = 0
    The acceleration, a = 3 m/s2
    Time taken, t = 20 s
    On using the first equation of motion we get,
    v = u + at
    Or, v = 0 + 3 x 20
    Or, v = 60 m/s
    Therefore, the final velocity of the car is 60 m/s.

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