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Dropping Objects

A car moving ...

Question

A car moving on a straight road accelerates from a speed of $4.1 m / s$ to a speed of $6.9 m / s$ in $5 s$ . Its average acceleration is

A

0.5 m / s^{2}

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B

0.6 m / s^{2}

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C

0.56 m / s^{2}

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D

0.65 m / s^{2}

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Solution

The correct option is C $0.56 m / s^{2}$
${\to a}_{a v g} = \frac{v_{2} - v_{1}}{t_{2} - t_{1}} = \frac{6.9 - 4.1}{5} = \frac{2.8}{5} = 0.56 m / s^{2}$

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