Question

A vector f1 is along the positive x-axis if its vector product with another vector f2 is zero then f2 could be

Answer 1

If the cross/vector product of a vector with another vector is a zero vector, then that presents two possibilities. Either on of the vectors is a zero vector or both the vectors are parallel to each other or collinear.

Thus, as per our question, if the cross/vector product of a vector F1 with another vector F2 is a zero, then that would mean that either:

1. one of them is a zero vector, or,

2. both the vectors are parallel to each other or are collinear.

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