Before release Note: all arrows around balloon, both inside and out are normal to surface Force of balloon surface on hand Force of straw on balloon surface.

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Air WALT: to know some of the characteristics of air

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Presentation transcript:

Before release Note: all arrows around balloon, both inside and out are normal to surface Force of balloon surface on hand Force of straw on balloon surface Straw Force of air on inside balloon surface This is supposed to be a hand squeezing balloon shut Note: force of balloon itself on air and air on the balloon are omitted. Force of hand holding balloon closed Force of air on outside balloon surface

After release Force of straw rocket pushing on balloon Reaction of exhaust on straw rocket Straw Exhaust action due to air inside balloon being forced out Note: all arrows around outside of balloon are normal to surface Force of outside air pushing on balloon Note: force of balloon itself on air is omitted.