COMEDK · Physics · 1. Mathematics in Physics
Which of the following statement(s) is/are correct?
- A Displacing a vector parallel to itself leaves the vector unchanged.
- B Three equal vectors cannot add upto zero.
- C If \(|\mathbf{A}+\mathbf{B}| \neq|\mathbf{A}-\mathbf{B}|\), they are perpendicular vectors.
- D Both \(b\). and \(c\).
Answer & Solution
Correct Answer
(A) Displacing a vector parallel to itself leaves the vector unchanged.
Step-by-step Solution
Detailed explanation
Three equal vectors can add upto zero when each of them is inclined at \(120^{\circ}\) with the other. If \(|\mathbf{A}+\mathbf{B}|=|\mathbf{A}-\mathbf{B}|\), they are inclined at \(90^{\circ}\) as shown below. In this figure, length of \(M N\) is equal to length of \(M O\). So,…
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