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Question

If ā†’C=ā†’A+ā†’B, then the magnitude of ā†’B is


A
65 N
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B
35 N
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C
55 N
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D
45 N
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Solution

The correct option is C 55 N
Here in this problem, we are given with magnitude and direction of two vectors.
Also, C=A+B
B=CA

And, the angle between the vectors is 90, so
|B|=|C|2+|A|2=102+52
|B|=55 N

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