A 15-Kg Block Sliding on a Rough Horizontal Surface Is Attached

question 80

Multiple Choice

A 1.5-kg block sliding on a rough horizontal surface is attached to one end of a horizontal spring (k = 200 N/m) which has its other end fixed. If this system is displaced 20 cm horizontally from the equilibrium position and released from rest, the block first reaches the equilibrium position with a speed of 2.0 m/s. What is the coefficient of kinetic friction between the block and the horizontal surface on which it slides?

• A) 0.34
• B) 0.24
• C) 0.13
• D) 0.44
• E) 0.17

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