A spacecraft travels from earth to moon & then on return trip from moon to earth. From earth to moon it requires $f_{1}$ units of fuel & from moon to earth it requires $f_{2}$ units of fuel, then

f_{1} < f_{2}

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f_{1} > f_{2}

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f_{1} = f_{2}

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Cannot say as it depends upon mass of the space craft

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Solution

The correct option is B $f_{1} > f_{2}$
Earth's pull is stronger hence we need more fuel to leave the field of earth.

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