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12. Which of the following phenomena applies the first law of motion?

A. A leaf sways back and forth falling from a tree.
B. When a ball falls on the floor, the ball bounces back up.
C. When pushed with the same force, a car accelerates slower than a grocery cart.
D. When a cardboard with a coin on top is suddenly pulled, the coin falls into the glass.

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Final answer:

The first law of motion states that an object will remain at rest or in uniform motion unless acted upon by an external force.


Explanation:

Newton's first law of motion, also known as the law of inertia, states that an object will remain at rest or in uniform motion in a straight line unless acted upon by an external force. This law is applicable in situations where there is no net force acting on an object, leading to various phenomena:

  1. A. The correct option that applies the first law of motion is C, where a car accelerates slower than a grocery cart when pushed with the same force due to differences in mass and acceleration.
  2. B. In contrast, options A, B, and D involve external forces or interactions causing the observed motion, not in line with the first law of motion.

Learn more about Newton's first law of motion here:

https://brainly.com/question/38603068


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