A 30-Kg Block Slides on a Rough Horizontal Surface

question 91

Multiple Choice

A 3.0-kg block slides on a rough horizontal surface. A force of 8.0 N acting parallel to the surface is applied to the block. The coefficient of kinetic friction between the block and the surface is 0.15. What is the magnitude of the block's acceleration?

• A) 1.9 m/s²
• B) 1.2 m/s²
• C) 2.3 m/s²
• D) 1.5 m/s²
• E) 2.9 m/s²

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Variations in the DNA sequences among individuals that contribute to the biological diversity of organisms.

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