A 18-Kg Block Is Released from Rest at the Top of of a Rough

question 30

Multiple Choice

A 1.8-kg block is released from rest at the top of a rough 30 $\degree$ inclined plane.As the block slides down the incline,its acceleration is 3.0 m/s² down the incline.Determine the magnitude of the force of friction acting on the block.

• A)4.2 N
• B)3.0 N
• C)3.4 N
• D)3.8 N
• E)2.3 N

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