A 16-Kg Block Slides Down a Plane (Inclined at 25 $\degree$

question 64

Multiple Choice

A 1.6-kg block slides down a plane (inclined at 25 $\degree$ with the horizontal) at a constant speed of 2.0 m/s.At what rate is the frictional force changing the mechanical energy of the block?

• A)+28 W
• B)+13 W
• C)-13 W
• D)-28 W
• E)+6.5 W

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