Questions
The resultant of two vectors A and B is perpendicular to the vector A and its magnitude is equal to half the magnitude of vector B. The angle between A and B is
detailed solution
Correct option is B
B2 = A2+B2+2ABcosθ ----(i)∴ tan900 = BsinθA+Bcosθ ⇒ A+Bcosθ = 0∴ cosθ = -ABHence, from (i) B24 = A2+B2-2A2 ⇒ A = 3B2⇒cosθ = -AB = -32 ∴θ = 1500Talk to our academic expert!
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(N-1) identical forces of magnitude F act simultaneously on a particle each making an angle of with the preceding one, the resultant is
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