Box A has a weight (gravity force) of 200 units and an area of contact of 40 units with the table.
Box B has a weight (gravity force) of 50 units and an area of contact of 10 units with the table.
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Explanation:
Normal force is a contact force. ... For example, the surfaces of a table and a box cannot exert normal forces on ... If there was only a downward force of gravity on the dog food, the dog food would have to
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