A 2.0-kg block situated on a frictionless incline is connected to a light spring (k = 100 N/m), as shown. The block is released from rest when the spring is unstretched. The pulley is frictionless and has negligible mass. What is the speed of the block when it has moved 0.20 m down the plane?
A. 76 cm/s
B. 68 cm/s
C. 60 cm/s
D. 82 cm/s
E. 57 cm/s
Answer: C
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