What if...
 Fred |
 Lilly |
„
Thus the football would have to move forwardly. But the balloon filled with helium not, because Max is holding it.
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„
I think, that it is not that easy. The helium balloon is floating in the air. But why acutally? Normally everything is pulled towards the earth by the weight force and the balloon would have to fall to the ground.
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„
So that the balloon can rise, there must be a greater force counteracting the weight force!
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And where does this force which is directed upwards come from?
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This force is the
buoyancy.
If the buoyancy is greater than the weight force, the balloon will rise until the two forces are in an equilibrium state.
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