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A block with mass 0.460 kg sits at rest on a light but not long vertical...

A block with mass 0.460 kg sits at rest on a light but not long vertical spring that has spring constant 85.0 N/m and one end on the floor.

a)How much elastic potential energy is stored in the spring when the block is sitting at rest on it? ANS 0.12J

b) A second identical block is dropped onto the first from a height of 4.10 mm above the first block and sticks to it. What is the maximum elastic potential energy stored in the spring during the motion of the blocks after the collision? ANS14.1J

c)What is the maximum distance the first block moves down after the second block has landed on it?

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