7.) (20 points) An 8.0kg block is being pulled up a rough incline by a 20 N force. The incline makes an angle of 37° with respect to the horizontal and

the coefficient of kinetic friction between the block and the incline is uk = 0.3. If the box is initially moving up the incline with a speed of 21m/s, what is the velocity of the block 5 seconds later?