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The square of resultant of two equal forces is three times of their dot product, the angle between the forces is
At what angle do the two forces (P + Q) and (P – Q) act so that the resultant is √(3P² + Q²).
Two vectors A⃗ and B⃗ are inclined to each other at an angle θ. Using parallelogram law of vector addition, find the magnitude and direction of their resultant. Calculate the magnitude and gives direction of R when (a) A⃗ and B⃗ act along the same straight line in the same direction. (b) A⃗ and B⃗ act along the same straight line but in opposite directions. (c) A⃗ and B⃗ are perpendicular to each other.
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