A block of 6.7 kg is set into motion up an inclined plane with an initial speed of uy= 7.2 m/s (see Figure). The block comes to rest after traveling d=4 m along the plane, which is inclined at an angle of 0-23 to the horizontal. For this motion determine Note: Signs are important (9 = 9.80 m/s) (1) the change in the block's kinetic energy Ak = 173.6€ u. (2) the change in the potential energy of the block AU Number (3) the friction force excreted on the block ( assumed to be constant) J = N (4) the coefficient of kinetic friction