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Instantaneous Velocity

A car moves a...

Question

A car moves along a straight line whose equation of motion is given by $s = 12 t + t^{2} - 2 t^{3}$ , where distance is in meters and time is in seconds. The velocity of the car to start will be

7 m / s

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9 m / s

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12 m / s

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16 m / s

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Solution

The correct option is D $12 m / s$
Velocity, $v = \frac{d s}{d t} = 12 + 2 t - 6 t^{2}$

Intially at $t = 0$ , $v = 12 m / s$

Suggest Corrections

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