3-3. When viewed from above, a worker slides a cabinet by applying the forces shown in Figure P3-3. Determine the moment about corner A. 39 lb 12 5 20' 32" 60 lb FIGURE P3-3 3-4. In an effort to tip a crate about the edge shown as point A (Figure P3-), " three forces are applied. Determine the moment about A due to these forces. .5 m 4 N . 1 m 6 N 3 m 8 NO 45 FIGURE P3-4