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three blocks are pushed along a rough surface by a force with magnitude p, as shown above. fc is the magnitude of the contact force between blocks 2 and 3, and ff, fn, and fg are the magnitudes of the friction, normal, and gravitational forces on block 3, respectively. which of the following is a correct free-body diagram for block 3?
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three blocks are pushed along a rough surface by a force with magnitude p, as shown above. fc is the...
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