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The vector projection of a vector $3 \hat{i} + 4 \hat{k}$ on y-axis is

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Correct option is D

As the multiple of j^ in the given vector is zero therefore this vector lies in XZ plane and projection of this vector on y-axis is zero.

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The vector projection of a vector 3i^+4k^ on y-axis is

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The vector projection of a vector $3 \hat{i} + 4 \hat{k}$ on y-axis is