When forces F1,F2 and F3 are acting on a...

When forces `F_1,F_2` and `F_3` are acting on a particle of mass `m` such that `F_2` and `F_3` are mutually perpendicular, then the particle remains stationary. If the force `F_1` is now removed then the acceleration of the particle is :

`F_1//m`

`F_2F_3//mF`

`(F_2-F_3)//m`

`F_2//m`.

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