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A dockworker applies a constant horizontal force of 70.0N to a block of ice on a smooth horizontal floor. The frictional force is negligible. The block starts from rest and moves a distance 10.0m in a time of 5.40s . What is the mass of the block of ice? If the worker stops pushing after 5.40s , how far does the block move in the next 4.50s ?

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