Drop it!

The force of gravitation affects everything on Earth. This invisible force is the reason why, for example, apples fall to the ground. Experiment with microgravity using a water bottle.

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Keywords: Physics, gravity, forces

Material:

• 2 or 4 tennis balls
• Strong string
• Scissors
• Marker pen
• Knitting needle or screwdriver
• Ball bearings/lead pellets/small coins – enough to fill one tennis ball
• Strong glue or strong sticky tape
• Sticky tape
• Craft knife