A worker drags a box of mass 50 kg that is initially at rest across a horizontal floor. The workerattaches a rope to the box and pulls on the rope so that the rope makes a constant angle of36. 8o above the horizontal. The coefficient of static and kinetic friction between the box and thefloor is 0. 18 and 0. 10, respectively. It takes the worker 5. 12 seconds to move the box 10 m fromrest.