A 40-Kg Block Starts from Rest and Slides 5

question 19

Multiple Choice

A 4.0-kg block starts from rest and slides 5.0 m down a plane inclined at 60º to the horizontal.The coefficient of kinetic friction between the surface and the block is 0.20.The work done by friction on the block is

• A)98.0 J
• B)19.6 J
• C)3.92 J
• D)3.40 J
• E)64.0 J

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