Gravity and Falling Paper

Discover why the same paper can fall differently after changing shape.

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Gravity pulls falling paper down. Air resistance acts against its motion through air. In still air, crumpling a sheet usually makes it fall faster by changing its shape and resistance, not by adding mass.

Worked example

Drop one sheet from a low height with adult help, then crumple that same sheet and repeat. Keep the height and release method the same. Never climb to make a drop.

A flat paper sheet and the same paper crumpled are shown in still air. Downward gravity and upward air resistance act on falling paper.

Would you believe it?

On Apollo 15, a hammer and a feather released together reached the Moon surface together. Essentially no air was there to slow the feather.

NASA: the hammer and feather

Question 1 What did crumpling the same sheet change? Its shape The amount of paper Earth's mass

Question 2 What pulls both shapes downward? Air always pushing down The paper's color Gravity

Question 3 For paper falling down through still air, air resistance points mostly where? It must be zero Up, against its motion Down, with its motion

Question 4 Which condition should stay the same in the comparison? Release height Paper shape Which result you hope to see

Question 5 What does a quicker crumpled-paper fall show? Crumpling always adds mass Gravity acts only on paper balls Shape and air resistance matter

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