Short Answer
As shown in the figure,a 4.0-kg block is moving at 5.0 m/s along a horizontal frictionless surface toward an ideal spring that is attached to a wall.After the block collides with the spring,the spring is compressed a maximum distance of 0.68 m.What is the speed of the block when the spring is compressed to only one-half of the maximum distance? 
Correct Answer:

Verified
Correct Answer:
Verified
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