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Name: ______________________________________ Date: ________________________ Student Exploration: Free-Fall Laboratory Vocabulary: acceleration, air resistance, free fall, terminal velocity, velocity, vacuum Prior Knowledge Questions (Do these BEFORE using the Gizmo.) 1. Suppose you dropped a feather and a hammer at the same time. Which would hit the ground first? _______________________________________________________________ 2. Imagine repeating the experiment in an airless tube (vacuum). Would this change the