A block of mass m=16. 8\;\mathrm{kg}m=16. 8kg is sliding on a surface with initial velocity v=23. 2\;\mathrm{m/s}v=23. 2m/s. The block has a coefficient of kinetic friction \mu_k=0. 426μ k =0. 426 with respect to the surface and is being pushed by a force of magnitude f=54. 3\;\mathrm{n}f=54. 3n in the direction of its motion. Due to kinetic friction, the block is slowing down. How long will it take for the block to come to a stop?.