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A rocket is fired vertically from the ground. It moves upwards with a constant acceleration 10 ms2 for30 seconds, after which the fuel is consumed. After what time from the instant of firing, the rocket will attairnthe maximum height ? (Take g = 10 ms-2 )g102)?A)75 s (taFZ)(B) 60 säťăŽre)(C) 45 s (torg)(D) 30 s (m) |
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Answer» S=ut+1/2(at²) s=4500m Putting in v²-u²=2as We get v=300m/s Now a=-10m/s² after the fuel is consumed So v=u-gt We get t=30s Total time for which rocket is ascending=30s+30s=60s Like my answer if you find it useful! |
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