vectors

Question: If $|{\overrightarrow V _1} + {\overrightarrow V _2}|\, = \,|{\overrightarrow V _1} - {\overrightarrow V _2}|$and ${V_2}$ is finite, then

1) ${V_1}$ is parallel to ${V_2}$

2) ${\overrightarrow V _1} = {\overrightarrow V _2}$

3) ${V_1}$ and ${V_2}$ are mutually perpendicular

4) $|{\overrightarrow V _1}|\, = \,|{\overrightarrow V _2}|$

Solution:

Explanation: explanation

multiplication-of-vectors

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