1.

At what angle should the two forces 2P and `sqrt(2P)` and `Psqrt(2)P` act so that resultant force is `Psqrt(10)`?A. `45^(@)`B. `60^(@)`C. `90^(@)`D. `120^(@)`

Answer» Correct Answer - A
(a) `Psqrt(10)=sqrt(4P^(2)+2P^(2)+4sqrt(2)P^(2)costheta)`
:. `theta=45^(@)`


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