NCERT Exemplar XVI — task. Science CBSE, Class 9.

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An object starting from rest travels

$20\ m$ in first

$2\ s$ and

$160\ m$ in next

$4\ s$ . What will be the velocity after

$7\ s$ from the start.

From the Equation of motion -

$II$ , We know that,

$i = (i \times i) + \frac{i}{i} \times i \times i^{i}$

From the Equation of motion -

$I$ , We know that,

$i = i + (i \times i)$

Acceleration in First

$2\ s$ $=$

$m\ s^{-2}$

Acceleration in next

$4\ s$ $=$

$m\ s^{-2}$

Velocity after

$7\ s$ from start

$=$

$m\ s^{-2}$

(Note: Enter your answers with no decimal places)

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62. NCERT Exemplar XVI