A ship was moving at a speed of $500 m s^{- 1}$ and it attained speed of 600 $m s^{- 1}$ in 5 seconds. What is the acceleration of the ship?

20 m s^{- 2}

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30 m s^{- 2}

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10 m s^{- 2}

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50 m s^{- 2}

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Solution

The correct option is A $20 m s^{- 2}$
Given, initial velocity, $u = 500 m s^{- 1}$ , final velocity, $v = 600 m s^{- 1}$ and time taken, t = 5 s
Let acceleration be 'a'.
From first equation of motion,
v = u + at
$600 = 500 + a \times 5$
$\Rightarrow a = \frac{600 - 500}{5}$ = $20 m s^{- 2}$

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