A 22-Kg Block Starts from Rest on a Rough Inclined Plane

question 15

Multiple Choice

A 2.2-kg block starts from rest on a rough inclined plane that makes an angle of 25° with the horizontal.The coefficient of kinetic friction is 0.25.As the block goes 2.0 m down the plane, the mechanical energy of the Earth-block system changes by:

• A)0 J
• B)-9.8 J
• C)9.8 J
• D)-18 J
• E)18 J

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