A 4.9 kg block is initially at rest on a horizontal frictionlesssurface when a horizontal force in the positive direction ofan x axis is applied to the block. The force isgiven by (x) = (2.8- x2) N, where x is inmeters and the initial position of the blockis x = 0. (a) What is the kinetic energy of the block as it passesthrough x = 2.8m? (b) What is the maximum kinetic energy of the block between x = 0and x = 2.8 m?