1). A55.0 kg box is placed on an inclined plane that makes an angle of 28.0 degrees with the horizontal. The coefficient of static friction between the box and the inclined plane is 0.680. Determine the static frictional force which holds the box in place.

2). The incline angle is slowly increased. Determine the maximum angle that the incline can make with the horizontal so that the box just remains at rest.

3). With the plane now inclined at this angle, what will the box do if it is given a slight push down the incline?rn