The Equivalence Principle

NASA STEM
Contributed By
NASA STEM
Resource Type
Instructional Resource
Keywords
hammer feather moon apollo drop a hammer and feather on the moon drop a feather and hammer on moon hammer on the moon feather on the moon gravity objects fall at same rate audio article audio podcast gravity pulls objects at the same rate acceleration due to gravity equivalence principle galileo
Subjects
Physical Sciences Physics History
Grade Levels
Grade 5 Grade 6 Grade 7 Grade 8 Grade 9 Grade 10 Grade 11 Grade 12 Post-Secondary
Audience
Classroom Teacher / Educator
Related Resources

The Equivalence Principle

In the folklore of physics, no story is better known than the tale of Galileo dropping balls from the Leaning Tower of Pisa and proving that gravity accelerates all objects equally. But was Galileo correct?

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