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A 1.8-kg block is released from rest at the top of a rough 30 ° inclined plane. As the block slides down the
incline, its acceleration is 3.0 m/s 2 down the incline. Determine the magnitude of the force of friction acting on
the block.
O a. 3.8 N
O b. 2.3 N
O c. 3.4 N
d. 4.2 N
e. 3.0 N

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