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. О а. 3.8 N O b. 2.3 N OC. 3.4 N d. 4.2 N O e. 3.0 N
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