Anti-Gravity Marble

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Materials:

• Small coffee can
• 1 marble

Problem:

• How can I make the marble stay in the can while having it turned upside down and off the surface of the table?
• The marble cannot be touched.
• The marble must stay in the can for at least two seconds.

Procedure:

• Place the can upside down on the surface of a table.
• Place the marble under the can.
• Move the can in a rapid circular motion, making certain the marble rotates around the inside of the can. While doing this procedure, lift the can straight off the table.

Solution:
Why does the marble stay in the can? Due to Centrifugal and Centripetal force, the marble remains in the can.

Centrifugal force: The force that tends to impel a thing or parts of a thing outward from a center of rotation.

Centripetal force: The force that is necessary to keep an object moving in a circular path and that is directed inward toward the center of rotation.