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Acceleration

If the distan...

Question

If the distance $s$ travelled by a particle in time $t$ is given by $s = t^{2} - 2 t + 5$ then its acceleration is

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Solution

The correct option is C $2$
$s = t^{2} - 2 t + 5$

$a = \frac{d^{2} s}{d t^{2}}$

$\frac{d s}{d t} = 2 t - 2$

$\frac{d^{2} s}{d t^{2}} = 2$

$∴ a = 2$

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