A 40-Kg Block Starts from Rest and Slides 5

question 30

Multiple Choice

A 4.0-kg block starts from rest and slides 5.0 m down a plane inclined at 60^o 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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