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7. Two-stage problem A 3.00-kg block is sitting at rest against a spring that is compressed...

7. Two-stage problem A 3.00-kg block is sitting at rest against a spring that is compressed an unknown amount. The block slides along a surface and up an incline before colliding with and sticking to a 1.50-kg block that is initially stationary and they move away at 3.5 m/s. The 1.50- kg block is 4.44 m above the initial location of the 3.00-kg block. The spring constant is 1965 N/m. All surfaces are frictionless.

a. Explain why the conservation of mechanical energy equation cannot be applied between the very beginning of the scenario and the very end of the scenario in order to find the initial spring compression.

b. Explain how you can solve for the initial spring compression in as few steps as possible. Modify the diagram to help in your explanation (and solution in part c).

c. Solve for the initial spring compression.

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