A 8.20 kg block of steel is at rest on a horizontal table. The coefcient of static friction between the block and the table is 0.440. A force is to be applied to the block. What is the magnitude of that applied force if it puts the block on the verge of sliding when the force is directed (a) horizontally, (bl upward at 500" from the horizontal, and (c) downward at 500" from the horizontal? (a) Number n Units v (b) Number n Units v (c) Number n Units v