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GATE 2020 AG – Question 51

Farm Power · Tractors and Power Tillers · 2 marks · Numerical answer

A two-wheel-drive tractor weighs25 kN, wheelbase2.2 m, CG0.7 m ahead of rear axle. A steady horizontal pull at hitch height0.5 m leaves front-axle load20% of total static tractor weight. Find net traction coefficient (two decimals).

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Correct answer: 0.64 to 0.66

Explanation

The final front reaction is0.20×25=5 kN. Moments about the rear contact give5(2.2)=25(0.7)−P(0.5), so P=13 kN. Rear driving-wheel load is25−5=20 kN. Net traction coefficient=P/Wrear=13/20=0.65.

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