Image courtesy of NASA
When the balloon is released, air is pushed out by the balloon. Which other force is acting that demonstrates Newton's third law of motion?
A.
The air is pushing back on the balloon in the same direction.
B.
Gravity is helping to move the balloon in the same direction.
C.
The weight of the balloon pushes it in the opposite direction.
D.
The air is pushing back on the balloon in the opposite direction.
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The correct answer is:
D. The air is pushing back on the balloon in the opposite direction.
This demonstrates Newton's third law of motion, which states that for every action, there is an equal and opposite reaction. When the air is expelled from the balloon in one direction, the air exerts a force back on the balloon in the opposite direction, causing it to move.
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