1. The homogeneous rectangular block of mass m rests on the inclined plane which is hinged about a horizontal axis through O. If the coefficient of static friction between the block and the plane is µ,, specify the conditions which determine whether the block tips before it slips or slips before it tips as the angle () is gradually increased.
2. A loaded wheelbarrow is placed on a rough incline. The combined weight of the wheelbarrow and its load acts at the center of gravity G. (a) Determine the maximum angle () for which the wheelbarrow will not slip. (b) Repeat if the wheelbarrow faces uphill. Neglect all friction associated with the front wheel B.
