Quote:
Originally Posted by Molten
Its not needed to be specified. It has already been given sort of. If the block is sitting on a table, we assume the plane is parallel to the ground and perpendicular to the gravitational force. Remember, it is a top view of the block.
Jason
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Top view with respect to what, though? The table, or the plane the forces are acting on? The ambiguity of the question leaves it perfectly open to interpretation that the table is flush with any of the six faces of the block. Assumptions are useful in solving situations like this, but they can also lead to highly erroneous answers if they are wrong.
There's a fine line between cockiness and confidence. Confidence is one of the major keys to success and happiness in life. As long as one can carefully stay on the right side of the line, staying connfident while remaining humble, and ego can be quite beneficial. - Karthik [more] 
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