Based on the descriptions of the scenarios:
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Two people roller blading: This situation demonstrates the principle of inertia, which aligns with the first law of motion: "A body in motion remains in motion or a body at rest remains at rest, unless acted upon by a force."
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Cars crashing: This situation illustrates the third law of motion: "For every action, there is an equal and opposite reaction." When two cars collide, the force exerted by one car on the other results in an equal and opposite force in return.
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Shopping cart: This scenario is best matched with the second law of motion: "Force equals mass times acceleration: F = m*a." The acceleration of the shopping cart depends on the force applied to it and its mass.
So the matches are:
- Two people roller blading: First law of motion (inertia)
- Cars crashing: Third law of motion (action-reaction)
- Shopping cart: Second law of motion (F = m*a)