4. In class, we solved the following problem: A 200-lb block rests on a horizontal plane. Find the magnitude of the force P required to give the block an acceleration of 10 ft/s² to the right. Assume the surface is extremely slippery that there is no friction. Now, determine the work done by P if the block moved 5 feet to the right. Use ft.lb for the unit of work. P 30° 200 lb

Fig: 1