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A block of mass m = 4 kg is dragged 2 m ...

A block of mass m = 4 kg is dragged 2 m along a horizontal surface by a force F = 30 N acting at `53^(@)` to the horizontal. The initial speed is `3 m//s and mu_(k) = 1//8`.
Find its final speed

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Now `DeltaK.E.=(1)/(2)m[v_(f)^(2)-v_(i)^(2)]=32J`
`(1)/(2)xx4[v_(f)^(2)-(3)^(2)]=32`
`impliesv_(f)=5m//s`
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