newton’s first law

Question

Which of the following situations best illustrates Newton’s First Law of Motion?

RankGuru · Accepted Answer

1. **Newton’s First Law (Law of Inertia)**: An object at rest stays at rest, and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced external force.
2. **Inertia of Rest**: This is the tendency of an object to remain in its state of rest. 
3. **Application**: When the card is flicked, a horizontal force acts on the card, but not on the coin. Due to its inertia of rest, the coin 'tries' to remain in its original position over the mouth of the glass.
4. **Result**: Once the card is gone, gravity pulls the coin down, and it falls into the glass.
5. **Other Options**: Rocket thrust and falling balls involve net forces and acceleration (Second Law).

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newton’s first law

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