"A rocket is fired vertically from the ground. It moves upwards with a constant acceleration of 10 m/s2. After 30 seconds the fuel is finished. After what time from the instant of firing the rocket will it attain the maximum height ?"
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\[ s = 0 \times 30 + \frac{1}{2} \times 10 \times (30)^2 \] \[ s = 0 + \frac{1}{2} \times 10 \times 900 \] \[ s = 0 + 5 \times 900 \] \[ s = 4500 \text{ m} \] Show more…
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