Physics for IGCSE & O level - Forces And Motion (Section 12 - No. 38)
In the context of Newton's third law, if a bird flies by pushing air downwards, what is the reaction force?
The weight of the bird.
The force of the air pushing the bird upwards.
The force of gravity on the air.
The force of air resistance.
Explanation
The reaction force is the force of the air pushing the bird upwards.
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