A 20-Kg Block Sliding on a Horizontal Frictionless Surface Is Attached

question 71

Multiple Choice

A 2.0-kg block sliding on a horizontal frictionless surface is attached to one end of a horizontal spring (k = 200 N/m) which has its other end fixed. If the block has a speed of 4.0 m/s as it passes through the equilibrium position, what is its speed when it is 20 cm from the equilibrium position?

• A) 2.6 m/s
• B) 3.1 m/s
• C) 3.5 m/s
• D) 1.9 m/s
• E) 2.3 m/s

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