The spring in FIGURE EX10.23a is compressed by Δx. It launches the block across a frictionless surface with speed v₀. The two springs in FIGURE EX10.23b are identical to the spring of Figure EX10.23a. They are compressed the same total Δx and used to launch the same block. What is the block€™s speed now?

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(b) (a) Δx Δx Identical springs ww 2xcq Xeq FIGURE EX10.23