Friction on Inclines

“A 25 kg box is placed on an inclined plane that makes an angle of 20° with the horizontal. The coefficient of friction between the box and the incline is 0.15. Calculate the acceleration of the box down the incline. A 10 kg block slides down an inclined plane set at 45° with the horizontal. If the coefficient of kinetic friction is 0.2, determine the acceleration of the block. A 5 kg object is on an inclined plane with an angle of 30° to the horizontal. The coefficient of friction between the object and the plane is 0.3. What is the acceleration of the object down the inclined plane?”