A rocket is fired vertically from the ground. It moves upwards with a constant acceleration of \... VIDEO
A rocket is fired vertically from the ground. It moves upwards with a constant acceleration of \( 10 \mathrm{~m} / \mathrm{s}^{2} \). After 30 seconds the fuel is finished. After what time from the instant of firing the rocket will it attain the maximum height ? \( \mathrm{g}=10 \mathrm{~m} / \mathrm{s}^{2} \) :
(1) \( 30 \mathrm{~s} \)
(2) \( 45 \mathrm{~s} \)
(3) \( 60 \mathrm{~s} \)
(4) \( 75 \mathrm{~s} \)
\( \mathrm{P} \)
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