Inclined Planes and Friction

“A 2 kg book slides down a 20° incline with an initial velocity of zero. The coefficient of kinetic friction between the book and the incline is 0.15. Calculate the acceleration of the book down the incline. A block is placed on a 35° incline. The coefficient of kinetic friction between the block and the incline is 0.30. If the block slides down the incline for 3 seconds, starting from rest, what is its final velocity? A 1.5 kg box slides down a ramp inclined at an angle of 25°. The coefficient of kinetic friction between the box and the ramp is 0.20. Determine the net force acting on the box parallel to the incline.”