Aim: To make a marshmallow shooter and work out what forces are acting on it.
Equipment: paper cup, scissors, balloon, marshmallow.
Method:
- cut out bottom of the cup.
- cut off the neck of the balloon.
- stretch the open end of the balloon over the bottom of the cup.
- place marshmallow in cup.
- pull balloon back to fire marshmallow.
Results:
Discussion:
The forces acting on the marshmallow while it is in the cup are all of them, gravity, thrust, support and friction/drag. These forces are all equally balanced as the marshmallow is completely stable. As soon as the marshmallow was released from the cup the greater force acting upon it is support alongside thrust, the support is pushing it upwards and the thrust from the push we give pushes it upwards. When it is falling down, gravity, is the greater force pulling it down.
Conclusion:
I think it worked pretty good, my group had to use some extra tape to hold the balloons and fix our broken cups but they still worked the same.
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