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Acceleration

The velocity ...

Question

The velocity of a car changes from $3 m / s$ to $21 m / s$ in $6$ seconds. What is the average acceleration of the car?

(16/3) m/s

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(15/3) m/s

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16 m/s

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15 m/s

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Solution

The correct option is C
16 m/s

Given,

Intial velocity = $3 m / s$

Final velocity = $21 m / s$

Time taken = $6 s$

$A v e r a g e a c c e l e r a t i o n = \frac{C h a n g e i n v e l o c i t y}{T o t a l t i m e}$
$= \frac{21 - 3}{6} = 3 m / s^{2}$

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