Newton's Second Law
Forces and Motion

Marshmallow Shooter

Enrichment Activity for 5-11 11-14


What you need

  • Piece of thin card (A4 size)
  • Sticky tape
  • Marshmallows

Instructions

  1. Roll the piece of card lengthways into a tube that is just wide enough to be a snug fit for a marshmallow.  Put tape along the whole length of the tube to hold it together and seal the join
  2. Put a marshmallow in one end of the tube, hold the tube horizontal, and blow from the opposite end. If the marshmallow doesn’t move, adjust the diameter of the tube. Note how far it flies
  3. Try again with a new marshmallow but this time blow from the end with the marshmallow.  Keep blowing until the marshmallow leaves the tube

Results and Explanation

By blowing as the marshmallow travels along the whole length of the tube, you’re applying a force for longer. This means the marshmallow accelerates for longer, emerges from the tube at a greater speed and flies further.

Newton's Second Law
is expressed by the relation F=ma
can be used to derive Kepler's First Law

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