The earth rotates from west to east. A wind mass begins moving due north from the equator, along the earth’s surface. Neglect all effects other than the rotation of the earth. The wind mass will

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move along a loop and return to its starting to point on the equator

shift a little east as it moves to higher latitudes

always move due north

shift a little to the west as it moves to higher latitudes

answer is B.

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Detailed Solution

Wind is moving due north relative to the surface of earth with velocity 'u' and earth is rotating with constant angular velocity w . So a wind mass 'm' experiences a coriolis force $\large m(\overrightarrow u\;X\;\overrightarrow w)$ .

Under the influence of corrolis force , the wind mass shifts a little east.

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