The acceleration of a car moving in positive $x -$ direction with an initial velocity of $6 m / s$ is $4 m / s^{2}$ . Its velocity at $t = 5 s e c$ is

26 m / s

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28 m / s

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24 m / s

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22 m / s

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Solution

The correct option is A $26 m / s$
Given, $a = 4 m / s^{2}, u = 6 m / s and t = 5 s e c$
Using first equation of motion we have
$v = u + a t$
$\Rightarrow v = 6 + 4 \times 5 = 26 m / s$
Hence, velocity at $t = 5 s e c$ is $26 m / s$ .

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