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Solve the all parts of given question:

Question: A dockworker applies a constant horizontal force of 79.0N to a block of ice on a smooth horizontal floor. The frictional force is negligible. The block starts from rest and moves a distance 12.0m in a time 4.90s.

Part I: What is the mass of the block of ice?

Part II: If the worker stops pushing at the end of 4.90s, how far does the block move in the next 4.80s?

Please show your all work and steps I am really confused.

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