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A force vec(F)=(2hat(i)+hat(j)+3hat(k)) ...

A force `vec(F)=(2hat(i)+hat(j)+3hat(k))` N acts on a particle of mass 1 kg for t = 2s. If initial velocity of particle is `vec(u)=(2hat(i)+hat(j))ms^(-1)`, then the speed of particle at the t = 2 s will be

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