Question
The magnitude of the resultant of two equal vectors is equal to the magnitude of either vector. What is the angle between the two vectors?
Answer: Option C
:
C
R2=A2+B2+2ABcosθ. It is given that R=A=B. Putting these values we have A2=A2+A2+2A2cosθ
or cosθ=−12 which gives θ=120∘
Hence the correct choice is (c)
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:
C
R2=A2+B2+2ABcosθ. It is given that R=A=B. Putting these values we have A2=A2+A2+2A2cosθ
or cosθ=−12 which gives θ=120∘
Hence the correct choice is (c)
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