Question: The 1 2 . 5 - lb block has a speed of 4 ft / s when the force of F = ( 8 t

The 12.5-lb block has a speed of 4 ft/s when the force of F =(8t^2) lb is applied. The coefficient of kinetic friction at the surface isk=0.2. Determine the speed of the block when t=2.0 s.

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