A B Pull Horizontal table
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You pull horizontally
on block B in Fig. E4.26, causing
both blocks to move together
as a unit. For this moving system,
make a carefully labeled freebody
diagram of block A if (a) the
table is frictionless and (b) there is
friction between block B and the table and the pull is equal in magnitude
to the friction force on block B due to the table.
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