Goes Up Must Come Down!
Summary: What Goes Up Must Come Down! is a controlled investigation which asks the question, "What will happen if objects with different masses are dropped at the same time?" Students hypothesize about the nature of falling objects, design an experimental test to answer the question using everyday objects, analyze data to form conclusions, and infer that mass does not affect the speed of falling objects. This activity culminates with the teacher demonstration (dropping a bowling ball and a golfball) to show that mass does not affect the speed of falling objects.
(must be kept the same)
(the ONE thing that changes)
|Type of Drop||Advantage||Disadvantage|
|two-handed, holding from above||easy to do||hands may not release at the same time|
|one-handed, holding from above||easy to do||fingers may release one object before the other|
|one handed, holding from below||objects can be easily held at the same level above the ground||hand must be pulled downward faster than the pull of gravity|
Day 2: What Will Happen If Objects with Different Masses Are Dropped at the Same Time? (45 min.)