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A smooth track in the form of a quarter-...

A smooth track in the form of a quarter-circle of radius 6 m lies in the vertical plane. A ring of weight 4(N) moves from `P_(1)` and `P_(2)` under the action of forces `F_(1) , F_2` and `F_3`. is always towards `P_(2)` under the action of forces `F_(1),F_(2)` and `F_(3)` Force `F_(1)` is always towards `P_(2)` and is always (20) N in maghitude, force `F_(2)` always acts hotizontally and is always (30 N) in magnitude, force `F_(3)` always acts tangentially to the track and is of magnitude `(15-10 s) N`, where s is in metre. If the particle has speed `4 m//s` at `P_(1)`,what will its speed be at `P_(2)`?

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