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RETROROCKET     : WATCH THE TUBE

With cardboard tubes alongside, this rocket looks and acts like real one - with retrorocket

You need :
Line hookup with one straw                 
2 toilet paper tubes
1 oblong balloon                                  
tape
1 paper clip                                         
scissors

What to do      :
With tape, attach the two tubes high along the sides of an inflated balloon. ( HINT : It's much easier to attach the tape to the inside of the tape against the balloon). Attach the balloon to the straw, release the balloon from an end of the line, observe what happens.

What happens            :
The balloon pushes or shoots down the line, but with less force, and does not reach the end of it.

Why    :The tubes like retrorocket, act as a counter-force, a force or action acting against the main thrust of the rocket balloon. This, in turn, slows down the main thrust of the rocket balloon and makes it unable to reach its target.
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