A block of 4 kg is set into motion up an inclined plane with an initial speed of 68 m/s (see Figure) The block comes to rest after traveling d 45 m along the plane, which is inclined at an angle of 0-26" to the horizontal For this motion determine Note: Signs are important (g = 9.80 m/s) 00 (1) the change in the blocks kinetic energy Ak (2) the change in the potential energy of the block AU (3) the friction force excreted on the block assumed to be constant) N (4) the coefficient of nec friction