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JEE MATHEMATICS MCQ: RATE MEASURE

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Application +4 | -1

A rocket, weighing 9000 N fixed vertically upward. The gasses are expelled at a rate of

30\,\,{\text{kg}}\,{{\text{s}}^{ - 1}}

with a speed of 0.6 km/s if the rocket weight 5000 N at the burnout, then the net upward force on the rocket at fire off should be

View answer and explanation

Correct option: B

1.8 \times {10^4}\,\,N

Option B (

1.8 \times {10^4}\,N

) is correct because the net upward force is calculated by multiplying the exhaust velocity by the rate of mass expulsion.

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