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GATE 2023 MN – Question 52

Geomechanics and Ground Control · Engineering Mechanics · 2 marks · Numerical answer

A UAV of mass 1.2 kg carries a 2 kg payload vertically through 100 m in 10 s at constant speed. Find lifting power in kW, to two decimals.

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Correct answer: 0.30 to 0.32

Explanation

Total lifted mass is 3.2 kg and speed is 100/10=10 m/s. Mechanical lifting power is mgv=3.2×9.81×10=313.92 W=0.31392 kW, or 0.31 kW. Constant speed means no additional kinetic-energy increase; no motor or aerodynamic loss allowance is supplied.

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