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Fighting gravity

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Science Middle School

Gravity's Strong Pull is Actually a Weak Force

Gravity keeps the earth, moon and sun in orbit. It keeps us on the ground instead of floating in space. And yet, it is the weakest of all the forces. This public radio story explores the velocity in rockets, the shapes of planets, the trajectories of baseballs, and even the strength of the human leg bones.

Physical Science Space Systems Forces and Newton's Laws Earth and Space Science

Story Length: 3:34

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Big Picture Science

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