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Finding Average Velocity

A particle mo...

Question

A particle moves according to the equation $x = t^{2} + 3 t + 4$ , the average velocity in the first $5 s$ is

8 m s^{- 1}

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7.6 m s^{- 1}

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6.4 m s^{- 1}

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5.8 m s^{- 1}

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Solution

The correct option is B $8 m s^{- 1}$
$x = t^{2} + 3 t + 4$
$v = \frac{d x}{d t} = 2 t + 3$
$v_{a v g} = Σ \frac{v_{i}}{6} = \frac{(2 \times 15) + (6 \times 3)}{6} = 8 m / s$

Suggest Corrections

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