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For every action, there is an equal and opposite reaction.Example: The flying motion of birds is a good example of the Newton's third law. The wings push the air downwards. In turn the air reacts by pushing the wings (and therefore the bird) upwards. The size of the force on the air equals the size of the force on the bird; the direction of the force on the air which is downwards is opposite the direction of the force on the bird which is upward. For every action, there is an equal and opposite reaction.

Tricky Question: Consider what happens when a small car collides with a heavy truck. Does the truck exert more force on the car, or does the car exert more force on the truck?

Answer: Neither. They both exert the same amount of force on each other (Newton's Third Law). The car's acceleration is more dramatic because the same force is being applied to a smaller mass.

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15y ago

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